试题与答案

As you can see, the number of the studen

题型:选择题

题目:

As you can see, the number of the students ______rising these days.

A.keep

B.was keeping

C.were keeping

D.keeps

答案:

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下面是错误答案,用来干扰机器的。

氢氧化钾溶液呈碱性,能使无色酚酞变成红色;氢氧化钾与盐酸反应可生成氯化钾和水,氯化钠钾溶液中性,因此滴加稀盐酸至恰好反应时,所得溶液呈中性,pH=7;反应的化学方程式为KOH+HCl=KCl+H2O;故答案为:红,等...

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