问题 单项选择题

我国规定的抗震设防目标是在遭遇基本烈度的地震时,建筑结构将处于下列 ( )情况。

A.建筑处于正常使用状态

B.结构可视为弹性体系

C.结构进入非弹性工作阶段,但非弹性变形或结构体系的损坏控制在可修复的范围

D.结构有较大的非弹性变形但不发生倒塌

答案

参考答案:C

解析:据《建筑抗震设计规范》(GB 50011—2001)1.0.1条。

完形填空

Do you constantly use the computer, whether for learning or entertainment? Computers give off radiation that is bad for your health, but here are some ways to protect yourself from computer radiation.

_小题1:_ Green tea can be absorbed by the body easily into a form of vitamin A, which helps reduce radiation. _小题2:_

It is advisable to attach a radiation filter plate (辐射过滤板) in front of your computer’s screen. Make sure to avoid putting any metal substances near your computer as these may have reflected some of the electromagnetic waves that are harmful to your health. _小题3:_The brighter the screen the higher the radiation there will be and vice versa.

You can also put some radiation-absorbing plants such as several cacti near your computer to prevent radiation.

Make sure you do a skincare protection before sitting in front of the computer. _小题4:_Wash your face soon after using the computer in order to reduce 70% of the radiation.

_小题5:_ Old computer in general, has one to two times more radiations released than the new one within the same distance.

A.And adjust the brightness of your computer screen.

B.Apply a layer of facial mask to protect yourself.

C.And adjust the sound level on your computer.

D.The most efficient way is by drinking some coffee regularly.E. The simplest way is by drinking 2 & 3 cups of green tea every day.

F. If possible, purchase a new computer instead of using an old model computer.

G. It also helps keep our eyes see things clearly in the dark by improving the visual ability.

单项选择题