问题 填空题

某学生设计了如图所示的关于实验室制取氢气的装置.

(1)选择图中的两处错误(不解释,不改正)______.

A.①用酒精灯加热    ②试管夹位置

B.①用向上排空气法  ②试管内导管的长度

C.①用酒精灯加热    ②用向上排空气法

D.①用向上排空气法  ②试管夹位置

(2)写出图中标有a、b两种仪器的名称:a______;b______.

答案

(1)实验室制取氢气,用锌和稀硫酸反应,是固液不加热反应,不需用酒精灯加热;氢气的密度小于空气的密度,需要用向下排空气法收集,不可用向上排空气法收集.所以图中的两处错误是①用酒精灯加热,②用向上排空气法.

故答案为:C.

(2)图中a是长颈漏斗,b是集气瓶.

故答案为:长颈漏斗;集气瓶.

阅读理解

A man was on the side of the road hitchhiking(搭便车) on a very dark night in the middle of a terrible rainstorm, with no cars on the road. The storm was so strong that the man could hardly see a few feet ahead of him. Suddenly, he saw a car come towards him and stop. The man, without thinking about it, got in the car and closed the door and only then did he realize that there was nobody behind the steering wheel(方向盘)!

The car started to move very slowly. The man looked at the road and saw a curve(拐弯处) coming his way. Terrified, he started to pray, begging for his life. He had not come out of shock when, just before the car hit the curve, a hand suddenly appeared through the window and moved the wheel. The man, paralyzed with fear, watched how the hand appeared every time the car was drawing near a curve. Finally, although terrified, the man managed to open the door and jump out of the spooky(怪异的) car. Without looking back, the man ran through the storm all the way to the nearest town. In a state of complete horror, the man walked into a nearby bar and asked for two glasses of Scotch whisky.

Then, still shaking with fright, he started telling everybody in the bar about the horrible experience he just went through in the spooky car. Everyone in the bar listened in silence and became frightened, with hair standing on end, when they realized the man was telling the truth because he was crying and he was certainly not drunk!

About half an hour later, two other young men walked into the same bar and one said to the other,“Hey, there’s a stupid man who jumped into the car while we were pushing it!”

小题1:When the car was first drawing near a curve, the man       .

A.felt very curious

B.was extremely frightened

C.cried for help

D.remained as calm as possible小题2:According to the passage, what made the man’s experience believable?

A.His reasonable behavior.

B.His vivid description.

C.His simple appearance.

D.His honest attitude.小题3:We can infer from the passage that       .

A.it is unsafe for people to take a free ride

B.the man was telling a lie to his listeners

C.the car probably broke down on the way

D.the two young men were familiar with the man

判断题