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【单选题】
正确使用数字式万用表需要注意方法，以下方法中不正确的是（）。A.
使用前仔细阅读说明书
B.
数字式万用表只能测量45~500Hz正弦波电量的有效值
C.
使用后，开关拨至“OFF”位置
D.
测量高压或大电流过程中拨动量程开关
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反馈参考答案：
举一反三
【简答题】简述货币的四种价值形式。
【单选题】The result was beyond all expectations, but she was quick to ______her surprise.
A.
hide
B.
conceal
C.
screen
D.
show
【单选题】The result was beyond all expectations, but she was quick to ____her surprise.
A.
hide
B.
hiding
C.
expose
D.
exposing
【单选题】, all of us agreed to go there with her.
A.
To her surprise
B.
To her surprised
C.
To she surprise
D.
To she surprised
【单选题】按先后顺序排列，PPPoE的discovery所包含的4个阶段为：________。
A.
PADO->PADI->PADR->PADS
B.
PADI->PADO->PADS->PADR
C.
PADI->PADO->PADR->PADS
D.
PADO->PADI->PADS->PADR
【简答题】Gladys Holm was a secretary (秘书). She worked in an office all her life. Gladys earned (挣) about $ 15,000 a year. She died when she was 86 years old. And she left a big surprise–$ 18 million! She gave ...
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