题目

循环示意图”，右图为“大气受热过程示意图”。读图回答7～9题。 7.埃特纳火山喷发形成的岩石类型是左图中的 A.甲       B.乙       C.丙      D.丁 8.直接受弥漫在大气中的火山灰影响而减弱的是右图中的 A.①       B.②       C.③      D.④ 9.图示箭头中，代表近地面大气主要的直接热源是 A.①       B.②       C.③      D.④We sometimes call the lion “the king of the jungle (丛林)” because it is stronger and more dangerous than other animals. It can run faster than many animals and it can hunt (捕猎) the best. It is the highest animal in the   1  food chain (食物链).In the sea, the shark is one of the animals at the  2  of the food chain. It can swim faster than most other sea animals, and it can use its big teeth to eat them. What is at the top of the world’s food chain?  3  are! We are not the biggest or fastest, but we are the   4  We could not run faster than cheetahs (猎豹),  so we  5  cars and now we can move the fastest. We could not  6  better than lions, so we invented guns (枪). Now we can hunt the best.People’s inventions are clever, but they can be dangerous, too. For example, people invented  7 , and now they make the air and rivers dirty. This can make   8  changes. Dirty rivers kill fish.  Then bears cannot eat the fish and the bears die. If we kill one part of the food chain,   9  also die. Remember that we are a part of the food chain, so we are in danger too! If we protect animals, we are protecting   10 ! We should and we could do something for the world!【小题1】A．landB．seaC．mountainD．desert【小题2】A．frontB．endC．topD．beginning【小题3】A．PeopleB．Lions C．SharksD．Cheetahs【小题4】A．strongestB．cleverestC．most specialD．most important【小题5】A．usedB．hadC．madeD．invented【小题6】A．fightB．escapeC．killD．catch【小题7】A．hotelsB．schoolsC．factories D．hospitals【小题8】A．greatB．terribleC．wonderfulD．complete【小题9】A．one partB．another partC．other partsD．the other parts【小题10】A．ourselfB．yourselves C．themselves D．ourselves