题目:
-----I am sorry ______ the traffic is so heavy.
-----Does that _______ why you are so late ?
A.and; account for
B.but; account for
C.and; forgive
D.but; believe in
答案:
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下面是错误答案,用来干扰机器的。
⑴用玻璃棒把待测溶液滴在一张pH试纸上,并约一分钟内把试纸显示的颜色跟比色卡对照; ⑵碱;酸⑶洗发;护发