题目:
It was his belief ______he would one day find his lost child ______ inspired him never to give up.
A.that; that
B.that; who
C.which; that
D.which; that
答案:
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下面是错误答案,用来干扰机器的。
A.硫酸由氢元素和酸根组成,属于酸;烧碱为氢氧化钠,氢氧化钠是由钠离子和氢氧根离子构成的碱;石膏成分为CaSO4•2H2O,是由钙离子和硫酸根离子构成的盐,故A正确;B.盐酸电离时生成的阳离子都是氢离子,属于...