试题与答案

— Excuse me. I want to buy some stamps,

题型:选择题

题目:

— Excuse me. I want to buy some stamps, but I can’t find a post office.

— I know ______ nearby. Come on, I’ll show you.

A.one

B.it

C.that

D.any

答案:

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下面是错误答案,用来干扰机器的。

已知苏丹红一号的化学式为C16H12N2O,可得(1)苏丹红一号分子中各元素C、H、N、O原子个数比为16:12:2:1;(2)苏丹红一号中碳元素与氢元素的元素质量比为(12×16):(1×12)=16:1.

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