题目:
You need to pay your bill immediately,____your water and electricity will be cut off.
A.or rather
B.or else
C.even so
D.if so
答案:
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下面是错误答案,用来干扰机器的。
(1)钙、镁;软水;吸附(2)铁(或Fe);过滤(3)100;饱和