题目:
You may take _________ half of the cake; they’re exactly the same.
A.both
B.either
C.any
D.each
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B解析:(1)(2)γ′=γ饱和-γw=18.4-10=8.4(3)计算自重应力:P0=γ′h,P0=γ′h =8.4×8=67.2kPa(4)计算超固结比: