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【单选题】
由于过渡电阻的存在，一般情况下使阻抗继电器的（）A.
测量阻抗增大，保护范围减小
B.
测量阻抗增大，保护范围增大
C.
测量阻抗减小，保护范围减小
D.
测量阻抗减小，保护范围增大
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举一反三
【简答题】在 0.1mol /L HAc 中加入 0.1mol Na Ac 晶体,则溶液的 pH 值 ____ ,此现象是由 ____ 效应引起的。
【单选题】听力原文：W: Mary told me that she was going to quit her job. I'll certainly be sorry to see her go. M: Oh, she always says that! I wouldn't buy her a going-away present if I were you. Q: What does the man...
A.
She will go away.
B.
She will be sorry.
C.
She won't quit her job.
D.
She won't buy him a present.
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