问题
判断题
废水呈酸性或碱性，一般都是用PH值来表示。
答案
参考答案：对
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废水呈酸性或碱性，一般都是用PH值来表示。
参考答案：对
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| Sam and Pat are brothers. They are in 1 class. Sam words 2 and studies better than his brother, Pat. One day, the teacher asked the class 3 a composition (作文). The name of it 4 "My Mother". Sam wrote a composition and 5 to hand it in (交) to the teacher when Pat said, "Wait a minute, Sam, let me 6 a look." Pat read it and 7 it. The next day, the teacher 8 Pat, "Why is your composition the same as 9 ?" " 10 we have the same mother," answered Pat. | ||||
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