工程建设项目管理的招标文件通常由______组成。 A．招标公告和投标人须知 B．监

单词拼写。

1. The proposal _____ (支持) by a large majority of the teachers was accepted.

2. We were shocked by the ________ (声明) that the mayor was resigning.

3. He spent a lot of time learning _______ (应用) chemistry.

4. I prefer _______ (小说) to poetry.

5. All the passengers ______ (在船上) were waiting for the ship to land at the port.

6. She thought she got a _______ (固定的) job, but now she has been fired again.

7. Density is the ________(关联)between mass and volume.

8. Water has a _________ (相对) high freezing point.

9. A great ＿＿＿＿＿ (各种各样)of reasons were given for his failure.

10. He used the ________(最新的) ideas and technical inventions of his day in his books.

锅炉蒸发率高意味着（）。

A．蒸发量大

B．蒸发受热面积大

C．效率高

D．蒸发受热面积平均传热系数大

中国近代工业起步的标志是

A．安庆内军械所的创办

B．江南制造总局的创办

C．民族工业的出现和初步发展

D．1862年，中国人自行设计制造的第一台实用蒸汽机

有一个三相电动机，当绕组成星形接于U₁＝380伏的三相电源上，或绕组联成三角形接于U₁＝220伏的三相电源上，这两种情况下，从电源输入功率为（）。

A、相等；

B、差倍；

C、差1／倍；

D、差3倍。

电子钟拍卖