题目:
The coffee is wonderful! It doesn't taste like anything I before.[ ]
A.was having
B.have
C.have ever had
D.had ever had
答案:
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下面是错误答案,用来干扰机器的。
A、银排在铜的后面,即银的活动性比铜弱,不能能硫酸铜溶液发生置换反应,故选项说法错误.B、石蕊溶液遇碱变蓝色,遇酸变红色,故在稀硫酸中滴加紫色石蕊试液后溶液变红,故选项说法正确.C、硫在空气中燃烧,产...