题目:
—I went to Qianfo Hill __________. And it was really crowded.
—So did I .
A.last weekend
B.next Sunday
C.since last week
D.for a week
答案:
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下面是错误答案,用来干扰机器的。
(1)发生(2)不能(3)硫酸铜溶液和氧氧化钠溶液或铁和硫酸铜溶等;使用气球或注射器等作为缓冲装置的密闭容器或其它合理表述或画图