问题 选择题

北京奥运会上运用高科技手段检测兴奋剂.“乙基雌烯醇”(C20H320)是兴奋剂中的一种,下列关于该兴奋剂的说法中正确的是(  )

A.该兴奋剂是一种有机化合物

B.该兴奋剂中碳元素的质量分数小于氢元素的质量分数

C.该兴奋剂中碳、氢、氧三种元素的质量比为20:32:1

D.该兴奋剂的一个分子中含有32个氢元素

答案

答案:A

阅读理解

仔细阅读,选择正确答案。

Dear Sir,

I have to travel every day from Souk Road to the airport. Two buses travel along the line: the number 49 and number 16. But by the time the number 16 bus gets to Souk Road, it is always full, so I can’t get on it. I have to wait for the number 49, because sometimes there are empty seats on it.

The timetable says that there are buses from Souk Road to the airport every ten minutes. If this is so, why do I have to wait half an hour for a bus every day?

The regulations(规章)say that if there are empty seats on a bus, the bus must stop at every stop where people are waiting. Why do the half-empty buses go straight past me when I am standing at the bus stop?

The regulations say that no bus may carry more than 40 seated passengers(乘客)and 20 standing passengers. Yesterday I was the first to get off the bus when it reached the airport. I counted(数)the other passengers as they got off. There were 129 of them.

It is clear that our bus companies break the regulations and think little of their passengers. Can nothing be done to make your service(服务)better?

A. a message        B. a talk       C. a story      D. a letter

小题1:The writer has to take Bus No. 49 because _________.

A.it arrives on time

B.it is not always full

C.it travels faster

D.it has fewer seats on it小题2:How long does the writer usually have to wait for a bus?

A.Ten minutes.

B.One hour.

C.Half an hour.

D.Nearly a day.小题3:The regulations say that each bus may carry ______ passengers at most.

A. 20           B. 40       C. 60       129

小题4:From the passage we can see that __________.

A.the bus service was bad

B.no passengers took their buses

C.no bus passed Souk Road

D.the writer was always the first to get on the bus

问答题 简答题