Science knowledge contest questions and answers (2)

101. In 1991, China initiated and hosted the Ministerial Conference on Environment and Development of Developing Countries and issued (_A__).

A. Beijing Declaration B. Agenda 21 C. Convention on Biological Diversity D. Framework Convention on Climate Change

102. The equatorial plane of the Earth (a circle perpendicular to the axis of rotation) The angle between the plane) and the Earth's orbital plane (ecliptic plane) is: (A).

A. 23.26 B. 35.37 C. 40.13 D. 18.5

103. In 1973, under the instruction of Zhou Enlai, the State Council held a meeting in (_A_) held the first national environmental protection conference.

 A. Beijing B. Shanghai C. Guangzhou D. Fushun

 104. What is "DTS" (B).

A. Digital technology system B. Digital home theater system

C. Management information system D. Digital education system

105. The characteristics of nuclear energy are (A ).

A Highly concentrated energy B Clean C Cheap

106. Which of the following is not one of the four great inventions in ancient my country: (E).

A Compass B Printing C Seismometer D Gunpowder E Steam engine

107. Environmental quality standards, pollutant emission standards, basic environmental standards, sample standards and method standards are collectively referred to as ( ) , is an important part of my country’s environmental legal system. (A)

A Environmental standards B Environmental certification C Environmental quality D Environmental system

108. Lasers are produced in: (A).

A 1953 B 1961 C 1960 D 1948

119. The 27th United Nations General Assembly decided to designate June 5th of each year as __A_.

A World Environment Day B Earth Day C Water Saving Day D Bird Love Day

109. The most prominent advantage of computer networks is (A).

A. Shared resources B. High accuracy C. Fast computing speed D. Large memory capacity

110. CAI refers to (B).

A. System software B. Computer-aided teaching software

C. Computer-aided design software D. Office automation system

111. Electronic computer technology is used in half of the world Although great progress has been made in the past century, its operation still follows the basic principles proposed by a scientist. He is (D).

A. Newton B. Einstein C. Edison D. Von Neumann

112. Within the computer, the form of access, processing and transmission of all information is (C).

A. ASCII code B. BCD code C. Binary D. Hexadecimal

113. The "Computer Software Protection Regulations" issued by the State Council came into effect on __C__,

A. June 1985 B. August 1990 C. October 1991 D. January 1992

114. A complete computer system should include (D) .

A. Computer and its peripheral equipment B. Host, keyboard, monitor

C. System software and application software D. Hardware system and software system

115 . Among the following storage devices, the information in them will be lost after power failure (B).

A. ROM B. RAM C. Hard disk D. Floppy disk

116. The language that the computer can directly recognize is (C).

A. Assembly language B. Natural language C. Machine language D. High-level language

117. The computer software system includes (D),

A. Programs and data B. System software and application software

C. Operating system and language processing program D. Programs, data and documents

118. Which of the following statements is correct (D) ,

A. The larger the computer, the more powerful its function

B. If the screen sizes of two monitors are the same, their resolutions must be the same

C. The more pins a dot matrix printer has, the more Chinese character fonts it can print

D. In the microcomputer performance indicators, the higher the CPU frequency, the faster its computing speed

119. UNIX is (C).

A. Single-user single-task operating system B. Single-user multi-task operating system

C. Multi-user multi-task operating system D. Multi-user single-task operating system

120. Computers made with transistors as electronic devices belong to (B).

A. The first generation B. The second generation C. The third generation D. The fourth generation

121. The total DNA "spiral staircase" of a somatic cell is about A meters. (A).

 A, 2 B, 3 C, 4 D, 1

 122. The diameter of DNA is only (C) Angstrom (l Angstrom is equal to 1/10 nanometer).

A, 30 B, 40 C, 20 D, 50

123. Bluetooth technology is a type of: (B),

A. A technology of genetics B. A short-distance wireless communication technology

C. A type of nanotechnology

124. Which of the following does not belong to broadband technology: ( C ).

A, DSL B, satellite C, DNS D, land-based wireless technology

125. The largest mammal in the world is (B)

A Elephant B blue whale C wild horse D shark

126. The Chernobyl nuclear power plant accident that occurred in (C) in 1986 was the most serious accident in the history of nuclear power in the world.

A. The United States B. France C. The former Soviet Union D. Germany

127. The seedless watermelon relies on B to continue the family lineage (B).

A. Cuttings B. Hybridization That is, passing on "parents" C, passing on oneself

128. In 1953, American biochemist Watson and others discovered that the structure of this gene is a double helix, and named it DNA, the Chinese name for (A).

A. DNA B, ribonucleic acid C, carbohydrates

129. The birth of the British cloned sheep "Dolly" is related to three female sheep. The first sheep Mammary gland cells are provided, and the second sheep provides an unfertilized egg cell that has had its genetic material removed. This "empty" egg cell is then fused with the mammary gland cells of the first sheep through micro-current stimulation and develops into an embryo. Finally, it was put into the womb of the third sheep to give birth to "Dolly", so which one is Dolly's parent in the genetic sense (C).

A The first sheep B The second sheep C The parents of the first sheep D The third sheep

130. Bird Love Week in our country is the last week of A every year . (A)

A, April B, May C, August D, October

131. The temperature required for biological reactions is higher than that of chemical synthesis reactions (B), < /p>

A is much higher B is much lower C is about the same

132. (A) is a type of ocean energy power generation, but it is the earliest, largest and most advanced technology in ocean energy utilization. A more mature one.

A Tidal power generation B Wave power generation C Tidal power generation

133. When an object leaves the earth, it must exert force on it in the opposite direction of the earth's gravity (i.e. upward), so that It accelerates, and when it reaches a certain speed, it stops accelerating, and it can move forward with inertia and break away from the earth.

When an object flies on the surface of the earth (that is, the distance is the radius of the earth), this speed is ( ), which is called the escape velocity or escape velocity. (A)

 A 11. 2 kilometers/second B 12. 2 kilometers/second C 21. 2 kilometers/second

 134. The grooves on car tires are mainly The function is: (A)

A. Increase the friction with the ground B. Remove rain and muddy water C. Increase the buffering of the car body

135. In a room with a constant temperature, you stand barefoot on the tiles It feels colder than standing on cotton because: (B)

A. The temperature of cotton is higher. B. Ceramic tiles conduct heat faster. C. The illusion of the body.

136. A person is on the equator If you weigh yourself once and go to the North Pole to weigh yourself again under the same physical conditions, then: (B)

A. It is heavier at the equator and lighter at the North Pole. B. It is lighter at the equator and heavier at the North Pole. C. Same. Heavy

137. If you release a filled hydrogen balloon, it will: (C)

A. Keep rising B. Stop rising after reaching a certain height< /p>

C. Keep rising and finally explode

138. Incandescent lamps will turn black after being used for a long time because: (C)

A. Glass aging B. Glass Discoloration when exposed to heat C, tungsten wire evaporates

139. Generally speaking, the environment is quiet when the sound is below (A).

A 50 decibels B60 decibels C70 decibels

140. The top ten environmental pollutions in the world are: (B)

A garbage pollution B air pollution C land Desert pollution

141. Which planet is the closest to the sun (B)

A. Mars B, Mercury C, Venus

142. The planet closest to the sun Which planet is the farthest planet (C)

A. Uranus B. Neptune C. Pluto

143. Trace elements refer to those present in various normal tissues in the body with stable content. But it is a type of elements that are less than 0.01% of body weight. How many of them are currently known to be necessary for the human body (C)

A, 10 kinds of B, 21 kinds of C, 14 kinds< /p>

144. What is the world’s first wide area network (A)

A. Arpanet B. Internet C. Intranet

145. What is WAN ( B )

A. Local area network B. Wide area network C. World Wide Web

146. How many different chemical reactions occur in the human brain every second ( B )

A, 8 B, 10 C, 12

147 There is a Great Red Spot on the surface of Jupiter, which is particularly eye-catching. About 400 years ago, astronomers discovered this mysterious Great Red Spot. What exactly is it? What is it (A)

A. Huge cyclone B. Volcano C. We don’t know yet

148. Which star does Westerners compare to the mythical god of the sea (C )

A. Uranus B. Mercury C. Neptune

149. What is the dimmest planet that can be seen with the naked eye ( B )

A. Pluto B. Uranus C. Jupiter

150 It has been discovered how many satellites Uranus has (A)

A. 15 B. 20 C. 14

151 , which star is the only "lying and walking" planet in the solar system (C)

A. Mars B. Venus C. Uranus

It took about 5 days for the 152 United States to launch In half a month, it reached the orbit of Mars and became the first spacecraft to orbit another planet (A)

A. "Mariner 9" B. "Pirate 1" C. "Pirates" No. 2"

153 Which planet has the title of "Little Earth in the Sky" (B)

A. Uranus B. Mars C. Jupiter

154 In which country is the Greenwich Observatory located (C)

A. The United States B. Egypt C. The United Kingdom

155. Theoretically, the time limit for a total solar eclipse is 7 minutes and 31 seconds. In actual observation, when and where was the longest total solar eclipse lasting 7 minutes and 15 seconds observed (A)

A. In 1955, in the Pacific Ocean B. In 1955, in the Atlantic Ocean

C. In 1956, in the Indian Ocean

156. In modern meteorological history, the most harmful typhoon occurred on November 12, 1970. In which country did it occur ( C )

A. Taiwan B. United States C. Bangladesh

157. In 1871, what other book did Darwin publish, proposing that humans gradually evolved from lower animals? Evolved from great apes (A)

A. "The Origin of Human Beings and Sexual Selection" B. "Origin of Species" C. Others

158. The direction of the wind refers to the wind blowing The direction in which the wind is coming is the direction in which the wind is blowing (A)

A. The direction in which the wind is blowing B. The direction in which the wind is blowing away

159. The person who named the Pacific Ocean was the leader who once led The fleet of which country's navigator Fernando Magellan (B) opened the way for mankind to circumnavigate the earth for the first time

A. Spain B. Portugal C. Britain

160. Which city is the largest port I have ever visited (C)

A

, Tianjin B, Dalian C, Shanghai

161. Which of the following cities is not one of the three provincial capital cities with higher green coverage in my country (D)

A. Nanjing City, Jiangsu Province B. Zhengzhou City, Henan Province C. Changchun City, Jilin Province D. Jinan City, Shandong Province

162. Protection of wild animals and their living environment, prohibiting (B) illegal hunting or destruction.

A. Any unit B. Units and individuals C. Individuals

163. The state implements key protection for rare and endangered wild animals. The wild animals under national key protection are divided into (A ),

A. First-level key protected animals and second-level key protected wild animals

B. Key protected animals and sub-key protected animals

C. Endangered Wild animals and rare wild animals

164. Serious impact of environmental pollution (C),

A. Adult intelligence B. Elderly intelligence C. Children’s intelligence

165. Human society is moving from the "Monster Age" to one with environmental protection, advocating nature and promoting sustainable development as its core (C).

A. New Era B. Environmental Protection Era C. Green Era

166. Among the birds in Xinjiang, the raptors that rank first in the country are species (B), (B)

A, 40 B, 46 C, 50

167 , The earth that astronauts see in space is mainly (A) color (A),

A, blue B, green C, yellow

168. " "Three rivers" refers to: (C)

A. Yellow River, Huaihe River and Haihe River B. Yellow River, Huaihe River and Liaohe River

C. Huaihe River, Haihe River and Liaohe River D. Yellow River, Yangtze River and Haihe River

169. The "three lakes" that are key to management in my country refer to (B),

A. Poyang Lake, Dianchi Lake and Bosten Lake; B. Taihu Lake, Dianchi Lake and Chaohu Lake;

C. Poyang Lake, Dongting Lake, Taihu

170. Green food requires that the environmental quality of the raw material growth area reaches the national air quality standard (A) level.

A. 1 B, 2 C, 3 D, 4

171. my country is a water-scarce country. The per capita water resource is only (C) of the world’s per capita amount.

A. 1 /2 B, 1/3 C, 1/4 D, 1/5

172. For green shopping, we should choose to buy (A),

A. Large-packaged goods B. Products in small packages

C. Disposable products D. Products with advertising materials

173. To protect the water environment, we should choose to use (B) washing powder.

A. Ordinary B. Phosphorus-free C. Cheap D. High price

174. Currently, there are 15 countries with serious water shortages in the world. Among the following three countries, which one is not serious? Water-scarce countries (C).

 A. Egypt B. Kuwait C. Brazil

 175. A swallow can catch (C) flies and mosquitoes in just one summer, which plays an important role in controlling diseases.

 A. 800,000 B. 1 million C. 1.2 million D. 1.4 million

 176. The number of insects eaten by a tit in one day and night is equal to (A).

A. Half of its own weight B. Its own weight

C. 1/3 of its own weight D. 1/4 of its own weight

< p> 177. Among the following recycled waste products, if not recycled, the one that will cause the greatest harm to the environment is (C).

 A. Waste paper B. Waste glass C. Waste battery

178. Which of the following practices is correct (B).

A. Plant rice beside the highway B. Do not drink fresh tea leaves C. Children eat too much fish floss

179. Where is the most polluted place in the room (C).

A. Bedroom B. Living room C. Kitchen D. Bathroom

180. The noise pollution we often refer to refers to (B)

A. Above 90dB B. Above 80dB C. Above 50dB

181. The main protected animals in Bayinbuluke Nature Reserve in Xinjiang are (B)

A. Whooper swan B. Whooper swan and little swan and other waterfowl C. wild camels

182. In which year did the scientific banding method begin (B)

A. 1900 B. 1899 C. 1902

183. When was the National Bird Banding Center established in my country (A)

A, October 1982, B, October 1983, C, September 1984

184. In which year did mobile phones begin to appear in the United States and Japan (C)

A. 1977 B. 1980 C. 1978

185. In which year? The British Broadcasting Corporation started broadcasting television (A)

A. 1930 B. 1945 C. 1935

186. In 1931, who successfully synthesized nylon fiber for the first time (B)

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A. Morgan (USA) B. Carruther (USA) C. Fluramine (Scotland)

187. Which of the following human diseases is related to mosquitoes (D)

A. Sleeping sickness B. Schistosomiasis C. Dysentery D. Malaria

188. Which of the following groups of animals all have claws (D)

A. Dogs , snake, seahorse B. lizard, whale, toad

C. frog, sturgeon, chicken D. crocodile, pangolin, eagle

189. The most important factor affecting the defoliation of trees in autumn It is: (B)

A. Changes in the average temperature of the atmosphere B. Changes in sunshine hours

C. Changes in moisture in the air D. Caused by the biological clock

190. The germination characteristics of rice seeds under conditions of insufficient oxygen supply are (A)

A. Long embryo and short radicle B. Short embryo and long radicle

C , long germ, long radicle D, short germ, short radicle

191. The bacteria that produce oxytetracycline belong to (D)

A. Bacteria B. Fungi C. Chain Mold D. Actinomycetes

192. Which of the following plants are all seed plants (B)

A. Hydrilla, pine leaf orchid B. Utricularia, seed fern

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C. Myriophyllum, horsetail D. liverwort, Spirogyra

193. Among the following plants, which type of plant has no sexual reproduction (B)

A. Bryophytes B. Cyanobacteria C. Brown algae D. Ferns

194. Which instrument can be used to obtain three-dimensional images: (A)

A. Scanning electrons Microscope B. Transmission electron microscope

C. Fluorescence microscope D. Optical microscope

195. Which of the following plants has seeds: (C)

A. Lycopodium B. Liverwort C. Ginkgo D. Naked fern

196. Suppose there are two plants growing together in a pot. When the two plants are planted separately, one of them dies. , the other grows much better, what is the relationship between them? (A) A. Parasitism B. Cytogenesis C. Autotrophy D. Heterotrophy

197. Aresi Bo Observatory is the largest astronomical radio telescope in the world. What is its diameter (A)

A, 305 meters B, 336 meters C, 120 meters

198. The sun is located in the four major Which spiral arm on the spiral arm (B)

A. Perseus arm B. Orion arm C. Sagittarius arm D. Three thousand parsec arm

199. December 11, 1999 At 2:33 pm on the same day, Moriye, a pilot from which country, hovered on Tianmen Mountain in Zhangjiajie for nearly a minute before successfully crossing the Tianmen Cave, thus becoming the first "strong man" in the history of world flight to cross a natural cave (C

)

A. The United States B. France C. Hungary

200. Leukemia was first discovered by Wilkov, a pathologist from which country, in 1846 (A)

A. Germany B. United States C. China