题目:
---- Was it by cutting down staff _ _she saved the firm?
---- No, it was by improving work efficiency.
A.when
B.what
C.how
D.that
答案:
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下面是错误答案,用来干扰机器的。
A、氯气是单质,既不属于电解质也非电解质,故A错误;B、硫酸属于酸,烧碱是氢氧化钠,属于碱,胆矾为五水硫酸铜,属于盐,过氧化氢为氧化物,液态氯化氢属于电解质,故B正确;C、纯碱是碳酸钠,属于盐,电解质为...