搜题请搜索小程序“爱下问搜题”
问题 单项选择题

图示结构，EI为常数，若欲使结点B的转角为零，FP1/FP2应为（）。

A．1.5

B．2

C．2.5

D．3

答案

参考答案：B

解析：

[点评] 本题考察超静定结构的位移计算，此处直接利用某些平衡条件求解将更为直接方便，但是需要灵活掌握位移法中等截面直杆的转角位移方程。

选择题

下列河流，属于大的地形单元分界线的是[     ]

A．伏尔加河

B．鄂毕河

C．叶尼塞河

D．乌拉尔河
查看答案
翻译题

阅读下面的短文，然后将划线部分的句子译成汉语或英语。

Mr. and Mrs. Smith come from Sydney(悉尼).小题1:They teach English in a school in China. They like their work. 小题2:They have a son Jim and a daughter Sue. They are all in China now. Mr. Smith can speak Chinese. He likes swimming and reading. Mrs. Smith likes swimming in the afternoon and cooking(做饭).小题3: Jim 和Sue喜欢打网球。They often play tennis with Chinese boys and girls.

Jim’s uncle, Mark, works on a farm（农场）near Sydney. 小题4:He likes swimming, too. He wants to work in China. 小题5:但是他不会说中文。 So he is still(仍然) there and goes to Chinese classes every week.
查看答案