关于电流表和电压表的使用,下列说法错误的是―             ( )

A．如不能估计被测电压、电流的大小,可取电表的任意两个接线柱进行试触

B．电压表可直接测量电源电压,而电流表不能直接接在电源两极间

C．测量前都必须选择合适的量程

D．都必须使电流从“+”接线柱流进电表,从“-”接线柱流出

连词成句。

1. things, Uncle, of, Tom, make, lot, machines, like, can, a

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2. shop, on, you, the, your, way, home, buy, from, can, things, usually.

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3. near, home, other, things, my, often, books, and, sells, supermarket, pens, 

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4. likes, very, Chinese, English, much, and, she 

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5. there, pictures, on, are, any, room, the, wall, of, the

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