题目内容

Among the six main problems that have pushed the environment to the edge, energy production and use has gained the least public attention.

A. 对
B. 错

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What does the girl want to buy?

A. coat
B. dress
C. shirt
D. trousers

Which color does the girl want to try?

A. green
B. yellow
C. white
D. blue

写出校园植物名录。

某一段电力线路两端电压的向量差称为 ,线路两端电压的幅值差称为 ,而工厂用电设备上所加的电压偏离电网额定电压的幅度称为。( )

A. 电压损失,电压降,电压偏移
B. 电压偏移,电压降,电压损失
C. 电压降,电压偏移,电压损失
D. 电压降,电压损失,电压偏移