单项选择题

According to the passage, how many sudden deaths are reported all over the world

A．400,000
B．600,000
C．800,000
D．none of the above
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单项选择题
According to the passage, sudden deaths are probably caused by ______.
A．mental stress
B．physical diseases
C．unexpected accidents
D．poisons
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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