单项选择题

In the forthcoming paragraph, the author is most probably going to talk about ______.

A．other rockets
B．how to drive a rocket belt
C．special fuels used in rockets
D．functions of the rocket belt
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单项选择题
This passage could be entitled ______.
A．Rockets
B．Principles of Rocket
C．Cylinder
D．The Rocket Belt
单项选择题
Which of the following is not stated in the passage
A．Though the rocket is very small, it provides the pilot much fun.
B．The rocket belt can fly short distance and high into the sky as well.
C．The pressure causes the cylinder to move away.
D．By regulating the left handgrip, the pilot can land on earth gently.
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