单项选择题

A．Businessmen, managers and accountants.
B．Chemists, physicists and biologists.
C．Governors, doctors and teachers.
D．Engineers, public servants and news reporters.
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单项选择题
A．Because he surpasses the fellow runners.B．Because he still can run.C．Because he overcomes fatigue with his will-power.D．Because he wins the prize.
A．Because he surpasses the fellow runners.
B．Because he still can run.
C．Because he overcomes fatigue with his will-power.
D．Because he wins the prize.
单项选择题
Even if you have electricity and water, you still cannot produce hydrogen everywhere.
A．Y
B．N
C．NG
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