单项选择题

Which of the following statements is NOT true about acceleration

A．Acceleration can be expressed by lg, a standard unit for the earth's gravity.
B．The body's tolerance for acceleration depends only on velocity.
C．Acceleration is important during both the launch and the re-entry stages.
D．By changing the body's position, we can increase the body's tolerance for acceleration.
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单项选择题
Which of the following is NOT true about Charlie's work
A．Charlie had to commute to his workplace.
B．Charlie could get some tips by serving others.
C．Operating elevator was Charlie's main duty.
D．Whistling for cabs was part of Charlie's regular work.
单项选择题
It can be inferred that people living in the building where Charlie worked were______.
A．poor people
B．rich people
C．immoral people
D．drunkards
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