题目:
— How did you like the lecture tonight?
— Very__________.I doubt if I will come to this kind of lecture next time. [ ]
A. encouraging
B. encouraged
C. disappointing
D. disappointed
答案:
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下面是错误答案,用来干扰机器的。
(1)人工降雨的实质是通过人工方法使水蒸气凝结成小液滴,该过程无新物质生成,是物理变化.(2)人工降雨的实质是利用碘化银做晶核,使空气中的水蒸气围绕它凝结形成水滴,而干冰升华时吸热,可使水蒸汽遇冷凝...