在空气中,丙烷的燃烧速度仅为乙烷速度的()。A、1/2 B、1/3 C、1/4

题型:单项选择题

问题:

在空气中,丙烷的燃烧速度仅为乙烷速度的()。

A、1/2

B、1/3

C、1/4

考点:焊工技能考试气焊工技师考试气焊工技师考试题库
题型:单项选择题

任务型阅读。阅读短文,根据其内容,完成下列任务。(10分)

Andy was still traveling in Spain when he realized he had to confirm(确认) his    home with the airline company. He was visiting Spain in order to improve his Spanish. When he was speaking to people face to face, he had no difficulty understanding what they said. However, when he was speaking on the phone, he still had a problem. Andy called the airline. And the clerk confirmed that his plane was leaving at nine o’clock three days from that day. She also told Andy to be at the airport a little earlier in order to check in his luggage and get a seat.

Since he was leaving in three days, Andy didn’t lose any time. He visited as many places as he could. He thought that it would probably be a while before he had enough money again. He wished he could come back and spend a year in Spain.

Too quickly, the final day arrived. Andy left early for the airport before take-off. He hated to rush. When he went to the clerk to show his ticket, the clerk looked at the ticket in surprise , “Why, sir, but your flight was at nine o’clock in the morning, and now it is eight in the evening.”“But I confirmed my flight,”insisted Andy.“Will I have to pay for another ticket?”

“No, Sir. However, the next flight out will be three days from now.”

Andy’s   ②  of shock turned to smile as he realized that now he could go on with his vacation.

任务一:请根据短文内容,分别写出①、②处所缺单词。(每空限填一词)

小题1:①______________   ②______________

任务二:根据短文内容补全句子。(每空限填一词)

小题2:(A) He visited as many places as _____________.

(B)From the passage we know Andy could ____________ his holiday.

任务三:请把上文中画线的句子翻译成汉语。

小题3:_________________________________________________________

任务四:请根据短文内容回答下列问题。

小题4:Why did the clerk tell Andy to be at the airport a little earlier?

________________________________________________________

小题5:How long was Andy late for the plane that day?

_________________________________________________________

题型:单项选择题

关系数据模型有许多优点,但下面所列的条目中哪一条不是它的优点( )。

A.结构简单

B.高度非过程化

C.有标准语言

D.可表示复杂的语义

题型:单项选择题

()是指证券是权利的一种物化的外在形式,它是权利的载体,权利是已经存在的。

A.资本证券 

B.要式证券 

C.证权证券 

D.有价证券

题型:单项选择题

辽宁省西南与()省接壤。

A.河北省

B.内蒙古

C.吉林省

D.黑龙江省

题型:单项选择题

电路两端的电压U=45V,电阻R=10Ω,若要求流经10Ω电阻的电流为3A,则应串联1个()的电阻。

A、10Ω

B、5Ω

C、15Ω

D、11Ω

更多题库