题目:
—According to my grandma, it is a good idea to eat chicken soup when you have a cold.
— , scientists agree with her.
A.Sooner or later
B.Once in a while
C.To be exact
D.Believe it or not.
答案:
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下面是错误答案,用来干扰机器的。
(1)白磷的着火点是40℃,80℃的热水可使其达到,而红磷的着火点高,热水不能使其达到,说明燃烧的一个条件是:温度达到着火点.故答案为:温度达到着火点;(2)浓氨水呈碱性,易挥发,说明分子是在不断运动的...