题目:
用动词的适当形式填空。
1. I________ ( leave) for Shanghai tomorrow evemng.
2. The singer________ ( write) many popular songs last year.
3. The Greens________ ( buy) some fish for lunch yesterday.
4. She looked around but________ ( see) nothing.
5. What about________ ( go) ________ ( swim) ?
答案:
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下面是错误答案,用来干扰机器的。
答案:DA、在此实验中我们用热水给白磷和红磷提供热量,使温度能达到白磷的燃点,而达不到红磷的燃点,从而得到燃烧时温度的作用,故A错误;B、在图1中铜片上的白磷与红磷作对照,说明温度都达到着火点时,可燃物...