一列火车长300米,已知它通过某隧道的时间是10min,这列火车速度为30m/s

题型:问答题

问题:

一列火车长300米,已知它通过某隧道的时间是10min,这列火车速度为30m/s,求隧道的长度.

考点:速度公式及其应用
题型:问答题

While travelling, Peter never enjoys visiting large cities because he thinks one city is much like ________.[ ]

A. the other  

B. another

C. the others  

D. others

题型:问答题

A traveler hurried down to the hall of an American hotel and went to the cash-desk. He had just 15 minutes to pay his bill and get to the station. Suddenly he remembered that he had left something in his room.

"Look here, boy," he said to the bellboy, "run up to my room and see if I have left a parcel on the table there. Be quick about it."

The boy ran upstairs. Five minutes passed. The traveler was walking up and down the hall, looking very angry. At last the boy appeared.

"Yes, sir," he reported to the traveler," you have left the parcel there, it's right on the table in your room."

小题1: The traveler _______.

A.ran down the street

B.came downstairs hurriedly

C.ran so quickly that he fell down

D.came into the hotel hall very quickly小题2:Which statement is true?

A.He had to pay his bill and arrived at the station in 15 minutes .

B.It took him 15 minutes to go to the station from the hotel.

C.He could pay his bill in 15 minutes and then go to the station .

D.He had nothing but 15 minutes.小题3: According to the passage, a bellboy is _____.

A.a boy whose work is to ring the bell

B.a boy who plays with a bell

C.a boy whose work in a hotel is to help guests with their bags

D.the hotel owner's boy小题4: The traveler asked the boy _____ .

A.to go upstairs

B.to look for his parcel

C.to fetch the parcel he had left in his room

D.only to see if the parcel was on the table in his room小题5:Five minutes later, the boy ______ .

A.ran up to the room

B.came downstairs

C.reported to the traveler in the room

D.came down to the hall but brought nothing back

题型:问答题

战略数据规划可划分为若干步骤来完成,以下各项内容   Ⅰ.建立企业模型    Ⅱ.确定研究边界   Ⅲ.建立业务活动过程  Ⅳ.确立实体和活动   Ⅴ.审查规划结果   哪些是完成规划时应包含的步骤

A. 仅Ⅰ和Ⅱ

B. 仅Ⅰ、Ⅱ和Ⅲ

C. 仅Ⅰ、Ⅱ、Ⅲ和Ⅴ

D. 全部

题型:问答题

在FIDIC《施工合同条件》中,颁发履约证书是表示( )。

A.承包的施工义务终止

B.合同终止

C.结清单失效

D.合同约定的权利义务已完全结束

题型:问答题

烧结类风机油泵必须在风机的起动前()后起动风机。

A、5分钟

B、10~15分钟

C、15~20分钟

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