搜题请搜索小程序“爱下问搜题”
问题 单项选择题

已经按框架计算完毕的框架结构，后来再加上一些剪力墙，结构的安全性将有什么变化（）？

A.更加安全

B.不安全

C.框架的下部某些楼层可能不安全

D.框架的顶部楼层可能不安全

答案

参考答案：D

解析：框架-剪力墙结构在水平荷载作用下，其侧向变形曲线既不同于框架的剪切型曲线，也不同于剪力墙的弯曲型曲线，而是两者的协调变形，其下部主要呈弯曲型，而上部主要呈剪切型。因此按框架计算完毕后再加上一些剪力墙对上部结构将是不安全的。

单项选择题

在TCP/IP参考模型中，互连层的主要功能不包括下述______。

A．处理来自传送层的分组发送请求

B．处理接收的数据报

C．处理互连的路径、流控与拥塞问题

D．处理数据格式变换、数据加密和解密、数据压缩与恢复等
查看答案
单项选择题

For the people who have never traveled across the Atlantic the voyage is a fantasy. But for the people who cross it frequently one crossing of the Atlantic is very much like another, and they do not make the voyage for the (56) of its interest. Most of us are quite happy when we feel (57) to go to bed and pleased when the journey (58) . On the first night this time I felt especially lazy and went to bed (59) earlier than usual. When I (60) my cabin, I was surprised (61) that I was to have a companion during my trip, which made me feel a little unhappy. I had expected (62) but there was a suitcase (63) mine in the opposite corner. I wondered who he could be and what he would be like. Soon afterwards he came in. He was the sort of man you might meet (64) , except that he was wearing (65) good clothes that I made up my mind that we would not (66) whoever he was and did not say (67) . As I had expected, he did not talk to me either but went to bed immediately.
I suppose I slept for several hours because when I woke up it was already the middle of the night. I felt cold but covered (68) as well as I could and tried to go back to sleep. Then I realized that a (69) was coming from the window opposite. I thought perhaps I had forgotten (70) the door, so I got up (71) the door but found it already locked from the inside. The cold air was coming from the window opposite. I crossed the room and (72) the moon shone through it on to the other bed. (73) there. It took me a minute or two to (74) the door myself. I realized that my companion (75) through the window into the sea.

A. had to jump B. was to have jumped
C. must have jumpedD. could be jumped
查看答案