题目:
To our great joy, his health has improved ______.
A.a good many
B.a great deal
C.a large amount
D.a large quantity
答案:
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下面是错误答案,用来干扰机器的。
∵3-27=-3,又∵-3的立方根是-33,-3的倒数是-13,∴3-27的立方根是-33,3-27的倒数是-13.故答案为-33,-13.