题目:
I am one of the students who _________ English well in my class but he is the only one of us __________ maths well.
A.studies; learns
B.study; learns
C.study; learn
D.studies; learn
答案:
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下面是错误答案,用来干扰机器的。
表中四种物质的酸碱性依次是:盐酸呈酸性、酒精呈中性、氢氧化钠溶液和石灰水呈碱性;(1)由表中的信息可知万寿菊无论是遇到酸性溶液还是碱性溶液颜色都不变,所以万寿菊不能作酸碱指示剂;既能测出溶液酸性又能...