工程上用的卵石与碎石相比有什么特点？

Earthquake safety tips

On April 14,2010, a big earthquake hit Yushu,Qinghai.Over,2,000 people died. Many people were hurt. Why are there earthquakes?

The surface of the Earth has many pieces. These pieces are always moving. When two pieces move past each other, there is an earthquake.

Scientist are working hard to find out more about earthquakes. They try to predict(预测) them, but it’s very hard.

Do you    know how to get ready for an earthquake? Do you know what to do during an earthquake? Here are some things you should know.

What to do before an earthquake

Make sure you have two bottles of water, a packet of biscuits(饼干),a clean towel(毛巾),a few band-aids(创口贴),a radio and a flashlight(电筒) at home.

What to do during an earthquake

If you are inside:

★    Stay where you are. Quickly move under a strong desk, or along a wall. This will protect you from falling things.

★    Don’t stand near windows.

★    Turn off the lights.

★    Don’t get into a lift during an earthquake. If your are in a lift, get out as quickly as possible.

If you are outside:

★    Don’t stand near buildings. Things may fall on you.

★    Lie on the ground until the shaking stops.

小题1:An earthquake hit Yushu _______.

A．on April 12,2010

B．on April 14,2010

C．on May 14,2010

D．on May 12,2010小题2:You need ________ at home before an earthquake.

A．some water and biscuits

B．a clean towel and a few band-aids

C．a radio and a flashlight

D．all of the things above小题3:You must protect yourself in an earthquake by ________.

A．keeping you from falling things

B．turning on the lights

C．standing near the window

D．getting into a lift小题4:The reason why an earthquake happens is that __________.

A．the surface of the earth is thin

B．the pieces of the surface are moving slowly

C．two pieces of the surface move past each other

D．there are too many people on the earth小题5:Which is TRUE according to the passage when you are outside in an earthquake?

A. You can play under a big tree.

B. You can’t stand near the buildings.

C. You can lie on the ground until the shaking stops.

D. Both B and C.

下列词语中加粗的字，每对的读音完全相同的一组是 [ ]

A．强求/牵强　纤夫/纤尘不染　来日方长/拔苗助长

B．宿仇/宿将　落笔/失魂落魄　差可告慰/差强人意

C．解嘲/押解　蹊跷/另辟蹊径　一脉相传/名不虚传

D．卡片/关卡　度量/置之度外　方兴未艾/自怨自艾

低压电机浸渍罐其浸渍压力一般为0.2MPa，真空度要求较低，一般为( )。

A．270～400Pa

B．1500～2500Pa

C．2500～3500Pa

D．2700～4000Pa

屠宰畜、禽的检验规程，由国务院有关主管部门会同（）制定。

A.国务院农业部门

B.国务院卫生行政部门

C.国务院质量监督部门

D.国务院质量检验部门

动情