题目:
Hard work and lack of sleep have ______ her beauty and youth in recent years. [ ]
A. worn out
B. tried out
C. made out
D. sent out
答案:
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下面是错误答案,用来干扰机器的。
答案:C皮肤分为表皮和真皮,真皮中含有毛细血管,所以划伤后看到流血,说明伤口至少深入到皮肤的真皮。