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问题 选择题

下列关于植物有性生殖过程的各项叙述，排列顺序正确的一项是

①植物的雄蕊发育成熟后产生花粉，花粉落到成熟的雌蕊的柱头上

②花粉管到达子房里的胚珠中，此时精子释放出来，与卵细胞结合，成为受精卵

③受到柱头分泌的黏液的刺激，花粉就开始萌发形成花粉管，花粉管内有精子

④果实或种子通过各种方式散播出去后，在适宜的环境条件下萌发成幼苗

⑤雌蕊的子房逐渐发育成果实，果实内具有一粒或多粒种子 [ ]

A．①③②⑤④

B．①②③④⑤

C．①③②④⑤

D．①②③⑤④

答案

答案：A

选择题

下列各句加点的成语使用恰当的一句是  (   )

A．他一会儿看小说，一会儿看电视，一会儿玩电脑，一晚上都马不停蹄，忽东忽西。

B．自从开通网上追逃以来，那些潜逃犯就无处遁形，在劫难逃，纷纷落入法网，等待他们的将是正义的审判。

C．真正优秀的主持人，不在于如何展示自己的才华，他应能使到场的嘉宾、观众从容自如，如坐春风地投入进去，活跃起来。

D．许多旅行家在描写极光时往往语焉不详，只说些“无法形容”之类的遁词。
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填空题

Part 3


Questions 19-25


·Read the following passage and choose the correct answer from A, B, C and D.
More and more, the operation of our businesses, government, and financial institutions are controlled by information that exists only inside computer memories. Anyone clever enough to modify this information for his own purpose can reap substantial rewards. Even worse, a number of people who have done this and been caught by it have managed to get away without punishment.
It is easy for computers crime to go undetected if no one checks up what the computer is doing. But even if the crime is detected, the criminal may walk away not only unpunished but with a growing recommendation from his former employers.
Of course, we have no statistics on crimes that go undetected. But it is disturbing to note how many of the crimes we do know about were detected by accident, not by systematic inspections or other security procedures. The computer criminals who have been caught may have been the victims of uncommon bad luck.
For example, a certain keypunch operator complained of having to stay overtime to punch extra cards. Investigating revealed that the extra cards she was being asked were for dishonest transactions. In another case, dissatisfied employees of the thief tipped off the company that has been robbed.
Unlike other lawbreakers, who must leave the country, commit suicide or go to jail, computer criminals sometimes escape punishment, demanding or not only that they not be charged but that they be given good recommendations and perhaps other benefiting, their demands have been met.
Why Because company executives are afraid of the bad publicity that would result if the public found out that their computer had been misused. They hesitate at the thought of a criminal boasting in open court of how he juggled the most confidential records right under the noses of the company’s executives, accountants, and security staff. And so another staff computer criminal departs with just the recommendation he needs to continue his crime elsewhere.

In which case it’s easy for computer crimes to go undetected

A．Somebody checks up what the computer is doing.

B．No one checks up what the computer is doing.

C．No way.

D．The passage didn’t refer.
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