助航灯光计算机监控系统对()光强等级进行监控。A.机坪泛光照明灯 B.坡度灯 C.跑

阅读理解。

     Two men were sick in hospital.  They  were in the same room.  One man could sit up on his bed for an

hour each afternoon.  His bed  was next to the room's only window.  The other man had to spend all of his

time lying in bed. Every afternoon when the man by the window sat up, he would describe to his roommate all the things he could see outside the window. "There is a lovely lake in the park.

      Ducks and swans are playing on the  water while  children are sailing  their model boats. Young lovers

are walking arm in arm around flowers of every color. " As the man described all these, the other man lying on the bed would close his eyes and imagine the beautiful scene.

      Days and weeks passed, One morning, the man by the window died. Then the other man  moved to

the bed by the window. He took his first look at the real world outside. He tried his best to find the

beautiful scene, but it was just a blank wall! The man asked the nurse   why his roommate had  described

such wonderful things outside this window. The nurse told the man his roommate was blind and could not

even see the wall.

1. How many windows were there in the room?

A. Only one.          

B. Two.

C. None.              

D. We don't know.

2. What did the man by the window do when he sat up?  

A. He enjoyed the beautiful things outside the window.

B.  He kept quiet because of illness.

C. He described to his roommate the beautiful things.

D. He played games with his roommate.

3. In the real world, there was/were outside the window.

 A. just a blank wall

 B. a park with a lovely lake

 C. many children

 D. many young lovers       

4. The underlined word "blind" in the last paragraph means "___________" in Chinese.

A.黑的

B.瞎的

C.盲目的

D.借口

5. Which of the following is NOT true?

A. The man by the window couldn't see anything.

B. The other man wasn't a blind man.

C. The man by the window died in the room.

D. There was a park outside the window.

基因是有“遗传效应的”DNA片段，下列哪项不是“遗传效应”的含义[ ]

A．能控制一种生物性状的表现

B．能控制一种蛋白质的合成

C．能决定一种氨基酸的位置

D．能转录成一种mRNA

如图，在△ABC中，AB=AC，以AB为直径的圆交AC于D．求证：BC²=2CD•AC．

用化学用语表示：

①水银______； 

②2 个氨气分子______；

③3个铁离子______；

④氧化镁中镁元素显+2价______．

下列选项中哪些有利于加强城市雨洪利用 ( )

A．河道渠化

B．采用可渗透铺装

C．建设屋顶花园

D．种植乡土植物

E．建设雨水收集设施