单选题
What serves as the evidence that man is changing?
A、
Man has got stronger eyes now than he ever had.
B、
Man's hair is getting thinner and thinner.
C、
Man's arms and legs have become lighter and weaker.
D、
Man has been growing taller over the past 500 years.
【正确答案】
D
【答案解析】
人类外貌逐渐变化的事实见证。其余选项均为人类未来的变化趋势而不是人类变化的证据。
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