单项选择题

A．It’s the ultimate cause of winds.
B．It causes vertical movements of air.
C．It reduces differences in air pressure.
D．It’s used to predict weather patterns.
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单项选择题
A．A third.B．Almost half.C．Less than three-fifths.D．More than three-fifths.
A．A third.
B．Almost half.
C．Less than three-fifths.
D．More than three-fifths.
单项选择题
A．It is definitely getting smaller.B．It is nearly extinct.C．The more they are killed, the quicker they reproduce.D．It is rebounding slightly since the ban on commercial whaling.
A．It is definitely getting smaller.
B．It is nearly extinct.
C．The more they are killed, the quicker they reproduce.
D．It is rebounding slightly since the ban on commercial whaling.
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