问题 解答题
我国小汽车已进入家庭,市场上某种型号的小汽车十分热销,为个增加产量,某汽车生产厂增加了设备,同时改进了技术,使该厂每小时装配的车辆数比原来提高
2
3
,这样装配40辆汽车所用时间比技术改造前装配30辆汽车所用时间还少2h,那么该厂技术改造后每小时装配多少辆汽车?
(1)设该厂技术改造前每小时装配x辆汽车.请填写下表:
工作效率(台/h)工作时间(h)工作总量(台)
技术改造前x30
技术改造后40
(2)请结合(1)的分析,解决题中问题.
答案

(1)填表如下:

工作效率(台/h)工作时间(h)工作总量(台)
技术改造前x
30
x
30
技术改造后
5
3
x
40
5
3
x
40
(2)设技术改造前每小时装配x辆汽车,根据题意得:

30
x
-2=
40
5
3
x

解得:x=3,

经检验x=3是原方程的根,

答:技术改造后每小时装配5辆汽车.

单项选择题
阅读理解

阅读理解。

     About twenty of us had been fortunate enough to receive invitations to a film-studio (影棚) to take

part in a crowd-scene. Although our "act" would last only for a short time, we could see quite a number

of interesting things.

     We all stood at the far end of the studio as workmen prepared the scene, setting up trees at the edge

of a winding path. Very soon, bright lights were turned on and the big movie-camera was wheeled into

position. The director shouted something to the camera operator and then went to speak to the two

famous actors nearby. Since it was hot in the studio, it came as a surprise to us to see one of the actors

put on a heavy overcoat and start walking along the path. A big fan began blowing tiny white feathers

down on him, and soon the trees were covered in "snow". Two more fans were turned on, and a "strong

wind" blew through the trees. The picture looked so real that it made us feel cold.

     The next scene was a complete contrast (对比). The way it was filmed was quite unusual. Pictures

taken on an island in the Pacific were shown on a glass screen (幕). An actor and actress stood in front

of the scene so that they looked as if they were at the water's edge on an island. By a simple trick like

this, palm trees, sandy beaches, and blue, clear skies had been brought into the studio!

     Since it was our turn next, we were left wondering what scene would be prepared for us. For a full

three minutes in our lives we would be experiencing the excitement of being film "stars"!

1. Who is the author?

A. A cameraman.

B. .A film director.

C. A crowd-scene actor.

D. A workman for scene setting.

2. What made the author feel cold?

A. The heavy snowfall.

B. The man-made scene.

C. The low temperature.

D. The film being shown.

3. What would happen in the "three minutes" mentioned in the last paragraph?

A. A new scene would be filmed.

B. More stars would act in the film.

C. The author would leave the studio.

D. The next scene would be prepared.