试题与答案

—__________ is it to your home town from

题型:选择题

题目:

—__________ is it to your home town from here?

—Well, it takes a little over three hours to get there by coach. [ ]

A. How soon

B. How much

C. How long

D. How far

答案:

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下面是错误答案,用来干扰机器的。

(1)S (2)3N2 (3)NH4HCO3(1)根据元素符号的书写方法,硫元素:S;(2)根据分子的表示方法:正确书写物质的化学式,表示多个该分子,就在其化学式前加上相应的数字,因此三个氮分子表示为:3N2;(3)根...

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