如图，电路，当滑片P向左滑动时，电表读数的变化是（） A．_爱下问搜题

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问题选择题

如图，电路，当滑片P向左滑动时，电表读数的变化是（　　）

A．电压表读数增大电流表读数增大

B．电压表读数减小电流表读数增大

C．电压表读数不变电流表读数不变

D．电压表读数增大电流表读数不变

答案

当滑片P向左滑动时，改变了通过本支路的电流，电源电压不变，另一条支路的电流不变，所以电流表的示数不变，电压表测量的是并联支路两端的电压（电源电压）示数不变．

故选C．

单项选择题

When buyer and seller discuss the terms of the contract，terms of shipment are (1) ．Terms of shipment include methods of transport，time for shipment，partial shipment and transshipment，port or place of loading and unloading， (2) ，etc．when the traders discuss the time of shipment in the contract，they should take the following into account：The (3) should consider whether he can get the goods ready before the shipment date and whether the ship is available if the goods are ready．The time of shipment should be stipulated in a clear and (4) way．Sometimes，the L/C simply stipulates an expiry date without a shipment date，which means these two dates are (5) ．

A．inflexible

B．flexible

C．inadaptable

D．adaptable

问答题简答题

简述品牌营销战略。