单项选择题

A．Cats can change their position while falling.
B．The force of impact with the ground over four legs is spread.
C．Cats can land on their feet after falling.
D．Their muscles can absorb more of the force of impact.
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单项选择题
A．The long, cold winters.B．Bad traffic at peak times.C．Noise from garbage trucks.D．So many police officers on the street.
A．The long, cold winters.
B．Bad traffic at peak times.
C．Noise from garbage trucks.
D．So many police officers on the street.
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