题型：问答题 简答题 完形填空。 Animals should live in the natural environment. They are beautiful and 1 then. But we have more and more population in the world, so there is less and less room 2 Our earth for wild animals. If we don't do something, some animals will 3 in their wild environment. And it also means a disaster (灾难) to 4 . One of the ways to stop the disaster is to build special places for all the wild animals. And then they 5 be protected from man. 6 wild animals should be collected, fed and copied by modern technology. We see many things 7 the animals in the past. Most of dangers to the animals' safety come from 8 activities. I would like to see an international law. It 9 the use and sale of meat, skins and tusks from wild animals. We do great wrong 10 we allow any of these wild animals to die out.( )1. A. strong ( )2. A. at ( )3. A. escape ( )4. A. the earth ( )5. A. may ( )6. A. Certain ( )7. A. improved ( )8. A. the earth's ( )9. A. stops ( )10.A. if B. lively B. in B. run away B. human beings B. can B. Many B. changed B. the wild animal'sB. attacks B. as C. exciting C. on C. get off C. the animal world C. should C. Few C. happened to C. the weather's C. protects C. as if D. enjoyable D .to D. disappear D. the environment D. will D. All D, took away D. man's D. describes D. when 查看答案
题型：问答题 简答题 指出下列2的意义：⑴CO2中“2”的表示意义：________________ ⑵Ca2+中“2”的表示意义：_______________ ⑶2N中“2”的表示意义：________________ 查看答案