海明码

题型:名词解释

问题:

海明码

考点:计算机硬件维修工程师计算机硬件维修工程师题库
题型:名词解释

阅读理解。

     What are you going to do if you are in a burning house? How will you escape it? Do you know how to save

yourself? Please read the following passage.

     Escaping a fire is a serious matter. Knowing what to do during a fire can save a life. It is important to know

the way you can use and show them to everyone in the family, such as stairs and fire escapes, but not lifts.

     From the lower floors of the building, escape through windows is possible. Learn the best way of leaving

by windows with the least chance of serious injury (伤). The second floor window is usually not very high from

the ground. Maybe it is safer to jump a short way than to stay in a burning building.

     Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the

window. Or smoke and fire may be drawn (吸) into the room. Keep your head low at the window to be sure

you get fresh air.

     On a second or third floor, the best windows for escape are these which open onto a roof. From the roof a

person can drop to the ground more safely. Bushes (灌木丛) and grass can help to break a fall.

1. The passage tells us how to escape from _____.

A. a fire

B. an earthquake (地震)

C. a flood

2. The second floor window is usually not very high from ______.

A. the house

B. the ground

C. the wall

3. You can't escape through ______ if you are in a burning house.

A. stairs

B. lifts

C. fire escapes

4. ______ to be sure you get fresh air when you are waiting for help in a burning house.

A. Keep your head low at the window

B. Keep your head high at the window

C. Keep the door open

5. According to the passage, which of the following is NOT true?

A. Escaping a fire is a serious matter.

B. Windows are also useful when you are waiting for help.

C. Bushes and grass can't help to break a fall.

题型:名词解释

已知半径为r和2r的两圆相交,则这两个圆的圆心距d的取值范围是___[ ]

A、0<d<3r        

B、r<d<3r        

C、r≤d≤3r        

D、r<d≤3r

题型:名词解释

罐底检查最小变形的局部凹凸度小于()。

A.±50mm

B.±60mm

C.±70mm

D.±80mm

题型:名词解释

好氧生物处理系统开车准备中,错误的做法是()

A.开车时对活性污泥或生物膜进行培养驯化

B.开车前对生化池进行闷曝

C.闷曝时补充营养物

D.提前间断对生化池进行闷曝

题型:名词解释

防毒面具用软质橡胶制成,面罩上嵌镶两块玻璃护目镜和呼吸活塞。

更多题库