问题
单项选择题
同一电磁线圈，分别接到电压值相同的直流电路或交流电路中，这时（）。
A.接入直流电路的磁场强；
B.接入交流电路的磁场强；
C.两种电路的磁场相同；
D.两种电路的磁场无法比较。
答案
参考答案：A
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同一电磁线圈，分别接到电压值相同的直流电路或交流电路中，这时（）。
A.接入直流电路的磁场强；
B.接入交流电路的磁场强；
C.两种电路的磁场相同；
D.两种电路的磁场无法比较。
参考答案：A
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| Mr. Green lives in a village. He has a big 1 and a strong dog. He has no work 2 in winter, so he goes to a city and 3 work there. When New Year is coming, he 4 his home to see his wife and children. But something is wrong with his eyes. When he 5 his door, his dog comes out and bites (咬) him. His wife 6 to drive it away (驱赶). He goes to see the doctor. The doctor gives him some medicine (药). Before he 7 , he tells him about his dog. The doctor 8 and says, "Something is wrong with its eyes, too, I 9 ." When he gets home, he tells his wife about what the doctor said. The woman says. "I'm 10 it's true. If a thief (小偷) comes in, it won't see him and he'll steal (偷) something." Mr. Green has to make the dog take his medicine. | ||||
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