问题
多选题
| 如图为理想变压器原线圈所接交流电压的波形．原、副线圈匝数比n1：n2=10：1，串联在原线圈电路中电流表的示数为1A，下列说法正确的是（ ） A．变压器输出端所接电压表的示数为20 B．变压器的输出功率为200W C．变压器输出端的交流电的频率为50Hz D．穿过变压器铁芯的磁通量变化率的最大值为20  |
V
/n2Wb/s
答案
BCD
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| 如图为理想变压器原线圈所接交流电压的波形．原、副线圈匝数比n1：n2=10：1，串联在原线圈电路中电流表的示数为1A，下列说法正确的是（ ） A．变压器输出端所接电压表的示数为20 B．变压器的输出功率为200W C．变压器输出端的交流电的频率为50Hz D．穿过变压器铁芯的磁通量变化率的最大值为20 |
BCD
My name is Alice. I’m 11 years old. I ____ a little sister. She’s 9 years old. ____ name is Kate. We have different habits(习惯). I like ______ TV very much. I like to watch ping-pong games ___ ___ TV. I think they’re fun. I like vegetables, such as carrots, ______ and so on. I also like apples and eggs. They’re good for us. Kate ______ running. She thinks it’s interesting. But I think they’re _____. Kate doesn’t like vegetables, ______ she likes French fries and ice cream. And she also likes hamburgers . I ______ think they’re healthy. So I don’t eat __ ___.
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