题目

1. They are waiting for you at the bus s______.2. Beijing is in the n________ of China. 3. My home is far from our school. It’s about 15        (千米). 4.Football in China is very p_______（受欢迎）. Everyone likes playing it. 5 We want to go to the park，but it d      on the weather. 答案：1.station/stop 2.north 3.kilometers 4.popular 5.depends 发电厂发电机的输出电压为U1，发电厂至学校的输电导线总电阻为R，通过导线的电流为I，学校得到的电压为U2.则输电线上损耗的功率可表示为：（  ）        A．                   B．        C．IU1                            D．I(U1－U2)