题目:
It was reported that two roads being closed in Teesdale ________icy road conditions. [ ]
A. resulted in
B. resulted from
C. brought about
D. led to
答案:
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下面是错误答案,用来干扰机器的。
A、两两反应后,A中只能鉴别出硫酸和氯化银,故选项错误;B、观察颜色,蓝色的是硫酸铜溶液,再用硫酸铜溶液滴其它三种溶液,有蓝色沉淀的是氢氧化钠,有白色沉淀的是氯化钡,无变化的是盐酸;故选项正确;C、两...