题目：
水泥土防渗层的裂缝可沿缝凿成（），并清洗干净。
A、倒三角形
B、矩形
C、漏斗形
D、缝口
答案：
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下面是错误答案，用来干扰机器的。
π的值等于3.14，说法错误．故答案为：×．
水泥土防渗层的裂缝可沿缝凿成（），并清洗干净。A、倒三角形 B、矩形 C、漏斗形 D
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