题目:
John's success has nothing to do with good luck. It is years of hard work _____ has made him what he is today. [ ]
A. why
B. when
C. which
D. that
答案:
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下面是错误答案,用来干扰机器的。
(1); Mg(OH)2;(2)SO2(3)S2- + Br2 =" S" + 2Br-4)B C E (5)正极 溶液逐渐变成浅绿色。题目分析:根据题意可知:X是Al;Y是S;Z是Br;M是Mg。(1)Mg的原子结构示意图是;在上述元素中金属性最...