问题
单项选择题
Tripping defects in anchors frequently occur in（）.
A.deep water
B.shallow water
C.stiff soils
D.soft soils
答案
参考答案：D
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Tripping defects in anchors frequently occur in（）.
A.deep water
B.shallow water
C.stiff soils
D.soft soils
参考答案：D