题目内容

导向支架或滑动支架的滑动面应洁净平整,不得有()现象。

A. 无阻或扭曲
B. 无阻或变向
C. 歪斜和卡涩
D. 歪斜和扭曲

查看答案
更多问题

听力原文:W:Hello,Tom. Where are you going?
M:Hello,Julia! I'm going to my aunt's.
W:Is that box heavy?
M:No, it' s light.
W:But it's filled with books! Can I help you?
M:Of course. Could you open the door,please?
W:OK.
M:Thanks.
What was in the box?

A lot of books.
B. A book.
C. Some paper.

听力原文:M. Peter began to swim in 1980 and he joined a swimming club in 1982.
W: Yes, I know. He set a new world record in 1997.
When did Peter set the world record?

A. In 1998.
B. In 1997.
C. In 1992.

有三个相互独立的投资方案甲、乙、丙,所有方案寿命均为10年,残值为0,基准收益率10%,可利用资本为18万元,项目有关数据见表3-2。
则最优方案组合为()。

A. 甲+乙+丙
B. 乙+丙
C. 甲+丙
D. 甲+乙

某工程双代号时标网络如下图所示,下列选项正确的是()。

A. 工作A的LF为3
B. 工作C的TF为1
C. 工作E的TF为2
D. 工作G的FF为3

答案查题题库