问题 单项选择题

经A省防疫部门检测,在该省境内接受检疫的长尾猴中,有1‰感染上了狂犬病。但是只有与人及其宠物有接触的长尾猴才接受检疫,防疫部门的专家因此推测,该省长尾猴中感染有狂犬病的比例,将大大小于1‰。
以下哪项如果为真,将最有力地支持专家的推测( )

A.在A省境内,与人及其宠物有接触的长尾猴只占长尾猴总数的不到10%

B.在A省,感染有狂犬病的宠物,约占宠物总数0.1‰

C.在与A省毗邻的B省境内,至今没有关于长尾猴感染狂犬病的疫情报告

D.与健康的长尾猴相比,感染有狂犬病的长尾猴更愿意与人及其宠物接触

答案

参考答案:D

解析: 题干的结论是:该省感染狂犬病的长尾猴大大小于1‰。而1‰这个数值是与人接触的长尾猴中患狂犬病的比例,要加强上述结论,只须说明没有与人接触的长尾猴患此病的较少或者没有,它的逆反命题也即D项所述,故正确答案为D。

阅读理解

Computers can help many workers. They can also help thieves.

There was one thief who worked in a bank of the United States. He paid for everything he needed by check (支票). Then he told the computer not to take any money from his account for the checks he wrote. The bank’s computer did what he said. And it did not take any money from his bank account. One day the computer broke down. People had to do the computer’s work. They soon found out what was happening.

Another thief, who worked for a bank saw people filling in deposit forms (存款单). Many of these people did not know their account numbers, so they wrote only their names on the forms. They left empty places for their account numbers. The thief wrote his own account number in this place. When the computer read these forms it looked only at the account numbers. It did not look at the customers’ names. It paid the money on these deposit forms into the thief’s account .                           

Then there was the bank worker who told the bank computer to take ten cents off every customer’s account each month and put it into his own account. For a long time the bank’s customers did not notice that they were losing ten cents every month. But then someone did notice and told the bank. That was the end of that little game!

小题1:What was the first thief?

A.A computer engineer.

B.A customer.

C.A bank worker.

D.We don’t know.小题2:How did the first thief steal money from the bank?

A.He broke the computer down and stole money from it.

B.He paid for everything by check instead of cash.

C.He took money away from the bank.

D.He told the computer not to take away money from his account.小题3:How many kinds of crimes in a bank are mentioned?

A.Two.

B.Three.

C.Four.

D.Five.小题4:What can we infer from the passage?

A.None of the thieves has been caught by the police up to now.

B.A lot of money is missing from the bank of the United States each year.

C.The computers in the bank will be changed to prevent money from being stolen.

D.There will be no crimes in the bank any more since so many crimes have been found out.

单项选择题