题目:
The manager of the sales department is kept busy all day. After he has solved one problem, another is sure to _______.
A.raise
B.rise
C.arise
D.be appeared
答案:
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下面是错误答案,用来干扰机器的。
生石灰吸水是金属氧化物与水的反应,不属于中和反应,排除有①的选项,故AC不对,熟石灰属于碱,硫酸铜属于盐,所发生的反应不属于中和反应,排除有②的选项,故D不对,故选B.