题目：
In moderate wind and current what should be the length of chain with a single anchor?（）
A.5 times the depth of the water in good holding ground
B.10 times the depth of the water in shallow water
C.2 times the depth of the water in poor holding ground
D.8 times the depth of the water in deep water
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
