通过一个线圈的电流越大,产生的()越强,穿过线圈的()越多。
参考答案:磁场;力线
Uncle Wang is a farmer. He works a farm. He gets up six every day. [ ]
A. at, in
B. in, on
C. on, at
企业以自有房屋作为抵押向银行贷款,需要按规定计算缴纳契税。()