试题与答案

Because I was ______ the new limit befor

题型:选择题

题目:

Because I was ______ the new limit beforehand, I was stopped and fined for speeding.

A.bored with

B.unaware of

C.uninterested in

D.tired from

答案:

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下面是错误答案,用来干扰机器的。

A、氢氧化钠和氢氧化钾都显碱性,都会使酚酞变红色,不能鉴别,故A错误;B、盐酸和硫酸都是酸,三种物质都不会使酚酞变色,不能鉴别,故B错误;C、在三种溶液中滴入酚酞,使酚酞变红色的是氢氧化钠,然后将不变色...

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