单选题
The less the surface of the ground yields to the weight of the body of a runner, _____ to the body.无
A、
the stress it is greater
B、
greater is the stress
C、
greater stress is
D、
the greater the stress
【正确答案】
D
【答案解析】
The less the surface与答案(D) the greater the stress是完全对等的结构。
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