生活中处处有化学，下列说法不正确的是（）。A可用肥皂水鉴别硬水和软水B煤、石油、天然气是取之不尽用之不竭的能源C铁在潮湿的空气中易生锈D塑料

生活中处处有化学，下列说法不正确的是（）。

可用肥皂水鉴别硬水和软水

煤、石油、天然气是取之不尽用之不竭的能源

铁在潮湿的空气中易生锈

塑料、合成纤维、合成橡胶属于合成材料

本题考查物质的组成。

B选项，煤、石油、天然气都是化石燃料，它们不是取之不尽用之不竭的。

A选项，肥皂水可以用来鉴别硬水和软水，肥皂水泡沫较少的是硬水，泡沫较多是软水。

C选项，铁在与氧气、水共存时易生锈，所以铁在潮湿的空气中易生锈。

D选项，塑料、合成纤维、合成橡胶是三大有机合成材料。

故正确答案为B项。

多做几道

下列物质中不属于合金的是（）。

玻璃钢

黄铜

生铁

硬铝

_______terrorism, the world would be much more peaceful.

If there was no

If there had no

Weren't there

Without

Mr. Smith, who_______ as a teacher in our school for about 20 years, is now our mayor.

has worked

worked

works

had worked

Do you think_______ a good idea that he sold the vegetables at half price_______ let them go bad?

it's; as well as

it; rather than

it's; instead of

it; as good as

_______ he got the news, Mr. Mathews hurried out of his house, _______ his car, and drove all the way to town.

When; started

The moment; started

Until; starting

Once; to start