问题
单项选择题
花粉壁中的孢粉素来源于（）
A.药室内壁
B.绒毡层
C.营养细胞
D.纤维层
答案
参考答案：B
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花粉壁中的孢粉素来源于（）
A.药室内壁
B.绒毡层
C.营养细胞
D.纤维层
参考答案：B
| 完形填空 | |||
| In 1982, Steven Callahan was crossing the Atlantic alone in his sailboat when it struck something and sank. He got into a lifeboat, but his supplies were __1__. His chances of surviving were small. __2__ when three fishermen found him 76days later, he was alive-much __3__ than he was when he started, but alive. His __4__ of how he survived is fascinating. His cleverness-how he __5__ to catch fish, how he evaporated(使蒸发) sea water to __6__ fresh water- is very interesting. But the thing that __7__ my eye was how he managed to keep himself going when all hope seemed lost, and there seemed no __8__ in continuing the struggle. He was starved and __9 exhausted. Giving up would have seemed the only possible choice. When people __10 these kinds of circumstances, they do something with their minds, which gives them the courage to keep going. Many people in __11 desperate circumstances __12 in or go mad. Something the survivors do with their thoughts helps them find the courage to carry on __13 difficulties. "I tell myself I can __14 it," wrote Callahan in his book. "Compared to what others have been through, I'm fortunate, I tell myself these things over and over, __15 up courage… I wrote that down after I read it. It __16 me as something important. And I've told myself the same thing when my own goals seemed __17 off or when my problems seemed too terrible. And every time I've said it, I've always come back to my __18 . The truth is, our circumstances are only bad __19 to something better. But others have been through the much worse, that is, in comparison with what others have been through, you're fortunate. Tell this to yourself over and over again, and it will help you __20 through the rough situation with a little more courage. | |||
| ( ) 1: A. full ( ) 2: A. And ( ) 3: A. th inner ( ) 4: A. attitude ( ) 5: A. helped ( ) 6: A. make ( ) 7: A. attacked ( ) 8: A. operation ( ) 9: A. partly ( )10: A. deal ( )11. A. similarly ( )12: A. bring ( )13: A. for the lack of ( )14: A. make ( )15: A. rolling ( )16: A. defeated ( )17: A. far ( )18: A. feelings ( )19: A. related ( )20: A. see | B. rich B. Yet B. stronger B. decision B. pretended B. absorb B. caught B. taste B. completely B. defend B. differently B. take B. in the face of B. carry B. using B. told B. long B. senses B. measured B. cut | C. few C. Still C. worse C. instruction C. managed C. choose C. froze C. message C. hardly C. survive C. gradually C. break C. in exchange for C. follow C. building C. introduced C. ever C. ideas C. contributed C. get | D. enough D. Thus D. healthier D. account D. intended D. replace D. cheated D. point D. generally D. observe D. commonly D. give D. as a result of D. respect D. making D. struck D. even D. influences D. compared D. think |