《2025年通城学典全程测评卷八年级英语上册译林版》

三、阅读理解。(每小题2分,共40分)
(-)阅读下列短文,从短文后每题所给的A、B、C、D四个选项中选出
最佳选项。
A实用性文本
If you have ever been swimming in the ocean,you may have
noticed that sea water is easier for people to float(漂浮)in than pool
water.You can do the following experiment to find out the reason.
You'l ! l need:
Two bowls,food colouring,a spoon,salt,and two eggs.
Steps:
1:Fill bowls halfway with water.

2:Add 10 tablespoons of salt to one bowl,mix the salt and water until the salt dissolves(溶解),and then add several drops of colouring.
3:Carefully,put an egg into each bowl of water and watch what happens.

What happens?
The egg in the plain water sinks(下沉).The egg in the salt water floats.(If the egg in the salt water does not float well,add more salt into the bowl.)The water and salt particles(粒子)in the salt water bowl are closer together than plain water particles are. They push harder against the egg than the plain water particles do and the egg floats.
( )1.According to the text,if the egg in the salt water doesn't
float,what may be the reason?
A.The water is too dirty..
B.The egg is too big..
C.The bowl is too small.
D.The salt is not enough..
( )2.What does the underlined part “ plain water ” probably mean?
A.Water mixed with salt.
B.Water mixed with sugar.
C.Water mixed with colouring..
D.Water mixed with nothing else.
( )3.The writer may write the passage to explain ______.
A.why the egg floats in the salt water
B.why people float more easily in the sea
C.how we can make the egg float in water
D.how the water and salt particles act together

答案： 1.D 2.D 3.B