题目:
In the eyes of the newlyelected prime minister, there is never too small a thing as far as the farmers __________.
A.are concerning
B.concern
C.are concerned
D.concerned
答案:
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下面是错误答案,用来干扰机器的。
AC.题目分析:A、氢氧化钠溶液具有腐蚀性,所以将新鲜鸡爪放入氢氧化钠溶液中放置一段时间后取出鸡爪由鲜红色变为白色,故A错误;B、pH=0的溶液显酸性能使紫色石蕊溶液变红,故B正确;C、食用白醋显酸性能使pH试...