题目内容

听力原文：W: Jack, have you got the book I asked you to borrow the other day？
M: Sorry, I haven't.
W: How come ？
M: I couldn't find time to go to the library.
Why didn't Jack get the book？

A. Because he didn't want to borrow the book.
Because there wasn't such a book in the library.
C. Because he was too busy to go to the library.

查看答案

搜索结果不匹配？点我反馈

更多问题

听力原文：M: This program says the movie starts at 6 o'clock.
W: Let's hurry. We still have fifteen minutes.
Q: What time is it now？
(3)

A. 5:45.
B. 6:15.
C. 6:00.
D. 6:50.

【B3】

A. looking
B. waiting
C. calling
D. searching

期权价格都将随标的物价格波动的增大而提高，随标的物价格波动的缩小而降低。 ()

A. 正确
B. 错误

某冶炼车间操作平台，梁跨度9m，柱距5m，柱顶与横梁铰接，柱底与基础刚接，其横剖面如图所示。全部平台结构自重2kN/m2，由检修材料所产生的活荷载为20kN/ m2，分项系数取1.3。每片排架柱顶水平活荷载H=50kN，在平台梁跨中设有检修用单轨吊车，其集中活荷载标准值F=100kN。沿各列柱间有纵向十字形交叉支撑，在框架平面外柱顶及柱底均视为铰接，平台面为密布铺板与梁牢固相连，能阻止梁受压翼缘的侧向位移。平台结构采用Q235-B钢材，焊接用E4303焊条，柱为工形焊接组合截面，钢板为焰切边，其截面尺寸及特性如下表。
计算柱的内力设计值，边柱N=kN，中柱N=kN，鉴定此排架__采用二阶弹性分析。

A. 511.9，1023.8，宜
B. 511.9，1023.8，不宜
C. 482.3，964.6，宜
D. 482.3，964.6，不宜