英 语阅读理解 AWhat is the sky?Where is it?How high is it?What lie

英 语
阅读理解 A
What is the sky?Where is it?How high is it?What lies above it?These questions are difficult to an-swer,aren‘t they?
Is the sky blue?No,the sky has no colour Is thc sky full of air(空气)?Yes,we know that there is air all over the world.When planes fly,they need air to lift(托起)their wins.Planes cannot fly very high,be-cause when they go higher,the air gets thinner(更薄),When we go high enough from the earth,we find there is no air.
Maybe we can answer some of the questions now.What is the sky?Nothing.Where is it?It`s all round thc world.The sky is space .In this space there is noth-ing but the sun,the moon and all the stars.
根据短文内容,选择正确答案.
26.What is the sky?
A.It is the clouds.
B.Iit is space.
C.It is the whole world
D.It is air.
27.The sky__________.
A.is blue
B.has no colour
C.is colourful
D.is of different colours at different times of the duy
28.Planes cannot fly very high ecause__________.
A.there will be less and less(更少)air to lift their wings
B.the flying machine is not good enough
C.the pilot(飞行员)will be afraid if he flies too high
D.there will not be enough air for the pilot to breathe
29.Inthe sky there is__________.
A.nothing
B.air everywhere
C.the earth
D.the sun,the moon and all the stars
30.The Chinese for“wing”is__________.
A.机身 B 机翼
C.机头 D机尾

DBADB