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A few years ago I was on a bicycle trip when I got off my bike for a rest. I sat down on the grass. A few seconds later, I was covered in ants. They were swarming all over me so I got up and brushed them off. It was a strange experience but I soon forgot about it. A couple of years later, I was living in Jordan. I had just moved into a modern flat and was unpacking plates when I saw something move out of the corner of my eye. I looked over at the kitchen drawer and there was a cockroach (蟑螂) crawling out of it. I screamed. Then I grabbed a can of insecticide and sprayed it on the cockroach. He ran under the nearby bathroom door. It took me three days before I found the courage to open the bathroom door to see if he was still alive. He wasn’t. Why did I react so violently to one lone insect when a closer encounter with hundreds of ants hardly affected me? The answer is easy: because cockroaches are creepy (令人毛骨悚然的) crawlies and ants aren’t. Creepy crawlies are those little bugs which cause feelings such as anxiety - they make your skin crawl. Did you know that some people feel such a fear of bugs that it becomes a phobia (恐惧症)? Psychologists have offered many explanations. Some say we associate them with dirt and disease. Or that these are life forms that are so alien to us, that we find them disgusting for their dissimilarity. Insects, however, don’t follow our rules - they just do what they want and invade our space. Unfortunately, although insects and bugs have been a successful animal species up to now, many of them, like many other species nowadays, are under threat of dying out. Entomologists warn that this could upset entire ecosystems and lead to all kinds of disastrous consequences. So my advice to you is: the next time you feel the urge to stamp on, splatter or spray a creepy crawly, give a thought to the planet and stop. 小题1:.. Why did the author mention the ants in the beginning? A.Because the experience with the ants presents a sharp contrast to that with the cockroach later. B.Because the author wants to show her preference to the ants and her dislike for the cockroaches. C.Because both ants and cockroaches are creepy crawlies that the author dislikes. D.Because meeting the ants is an unusual experience that the author can hardly forget. 小题2:. The underlined word “insecticide” in Paragraph 2 probably means . A.a kind of fruit juice B.a kitchen knife C.liquid for killing insects D.cleanser (洗涤剂)for the bathroom 小题3:. How does the author feel about bugs like cockroaches? A.The author doesn’t mind the contact with those harmless small creatures. B.The author prefers cockroaches to ants and feels guilty for killing one. C.They invade our space and become a threat to humans. D.They still deserve a place for keeping the balance of the nature. 小题4:. Which of the following statements about bugs is NOT true according to the passage? A.Some people may be frightened so much by bugs that it leads to a psychological barrier to some degree. B.The earth will have a better and cleaner environment if more creepy crawlies are killed. C.Many bugs are in danger of dying out so we should not kill them due to fear or disgust. D.Some bugs are extremely unpleasant that some people have a strong wish to destroy them.
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【单选题】已有定义int x=9;,执行语句if(++x) x=x+1;后x的值是( )
A.
8
B.
9
C.
10
D.
11
【单选题】判断市场规模时,最常用的标准是()
A.
各经营者的市场占有率
B.
人口地理分布
C.
旅游者的行为特征。
D.
旅游目的地
【单选题】假定int类型变量占用两个字节,已有定义:int x[10] = {0,2,4}; 则数组 x 在内存中所占字节数是?
A.
20
B.
6
C.
3
D.
10
【简答题】原子间的化学键合包括 、 、 。
【判断题】控制通道的时间常数越小,则控制作用的影响越和缓,控制过程变得很缓慢;反之时间常数过大.控制过程变化较激烈,容易振荡,所以控制通道的时间常数过大或过小,在控制上都不利。
A.
正确
B.
错误
【单选题】已有定义:int x[10],*p; 能正确赋值的语句是:
A.
p=&x;
B.
p=x[0];
C.
*p=&x[0]
D.
p=x;
【单选题】单回路反馈控制系统下面哪个描述是不正确的?
A.
干扰通道滞后时间 越大系统控制品质越差
B.
控制通道滞后时间 使被控参数的最大偏差增大了,超调量增加了,引起了系统动态指标下降
C.
控制通道时间常数 太大,则控制作用弱,被控参数变化缓慢,控制不够及时,控制质量下降
D.
干扰通道时间常数 越大,外部干扰对被控参数的影响越小,系统的控制品质越好
【判断题】调节通道的时间常数越小,则控制作用的影响越和缓,调节过程变得很缓慢;反之时间常数过打.调节过程变化较激烈,容易振荫,所以调节通道的时间常数过大或过小,在控制上都不利。
A.
正确
B.
错误
【单选题】判断旅游市场规模的最常用标准是
A.
各经营者的市场占有率
B.
旅游市场的接待总人数
C.
饭店客房的出租率
D.
游客平均停留天数
【简答题】原子间的化学键合包括 、 、 。
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