摘要： A. to go B. goes C. go E Look at this picture. This is a photo 41 my family. There are 42 people in the picture. They are my father, my mother, my brother, my sister and 43 . 44 father is very happy every day. My mother 45 near my father. The boy beside my mother is my 46 . The 47 near my mother is my little sister. 48 is very clever and cute. Everyone likes her very much. Who is 49 boy in the middle ? Ah! It is me. 50 love my family very much.
Rockets(火箭)can fly far out into space．Rockets with men inside them have already reached the moon in the USA and Russia．Several rockets without men inside them have been sent to other worlds much farther away．On Nov．7, 2007, China’s first lunar probe, Chang’e I, successfully has completed its 1,580,000 km flying journey to the moon．
I am sure that you are asking ‘How does a rocket fly?’ If you want to know, get a balloon and then blow it up, until it is quite big．Do not tie up the neck of the balloon, let it go．The balloon will fly off through the air very quickly．The air inside the balloon tries to get out．It rushes out through the neck of the balloon and this pushes the balloon through the air．
This is how a rocket works．Of course, the rocket is made of metal．The metal must not be heavy but it must be very strong．There is gas inside the rocket, which is made very hot．When itrushes out of the end of the rocket, the rocket is pushed up into the air．The jet velocity(喷射速度)is always faster than the flying speed．
We’re sure that one day rockets with man may be able to go anywhere in space．
(1)
The underlined word ‘gas’ in the passage means _________．
[ ]
A．
气体
B．
液体
C．
汽油
D．
气球
(2)
Look at the following pictures, if ‘U’ means ‘jet velocity’, ‘V’ means ‘flying speed’, which picture is RIGHT?
[ ]
A．
B．
C．
D．
(3)
The rocket is made of _________．
[ ]
A．
light and strong metal
B．
heavy and strong metal
C．
light and strong gas
D．
heavy and strong gas
(4)
The underlined word ‘it’ here refers to _________．
[ ]
A．
the rocket
B．
the metal
C．
the air
D．
the hot gas
(5)
Which of the following is NOT right?
[ ]
A．
Men have been to the moon by rocket．
B．
A balloon can fly if the air in it goes out completely．
C．
It’s about 1,580,000 km from the moon to the earth．
Rockets(火箭)can fly far out into space．Rockets with men inside them have already reached the moon in the USA and Russia．Several rockets without men inside them have been sent to other worlds much farther away．On Nov．7, 2007, China’s first lunar probe, Chang’e I, successfully has completed its 1,580,000 km flying journey to the moon．
I am sure that you are asking ‘How does a rocket fly?’ If you want to know, get a balloon and then blow it up, until it is quite big．Do not tie up the neck of the balloon, let it go．The balloon will fly off through the air very quickly．The air inside the balloon tries to get out．It rushes out through the neck of the balloon and this pushes the balloon through the air．
This is how a rocket works．Of course, the rocket is made of metal．The metal must not be heavy but it must be very strong．There is gas inside the rocket, which is made very hot．When itrushes out of the end of the rocket, the rocket is pushed up into the air．The jet velocity(喷射速度)is always faster than the flying speed．
We’re sure that one day rockets with man may be able to go anywhere in space．
(1)
Look at the following pictures, if ‘U’ means ‘jet velocity’, ‘V’ means ‘flying speed’, which picture is RIGHT?
[ ]
A．
B．
C．
D．
(2)
The underlined word ‘it’ here refers to ________．
[ ]
A．
the rocket
B．
the metal
C．
the air
D．
the hot gas
(3)
Which of the following is NOT right?
[ ]
A．
Men have been to the moon by rocket．
B．
It’s about 1,580,000 km from the moon to the earth．
C．
A balloon can fly if the air in it goes out completely．
