异步电动机的定子铁芯一般是由厚()且表面有绝缘层的硅钢片叠压而成的。
A.0.35~0.5mm
B.0.5~1mm
C.1~1.5mm
D.1.5~2mm
参考答案:A
_____ in the fields on a March afternoon, he could feel the warmth of spring. [ ]
A. To walk
B. Walking
C. Walked
D. Having walked
房地产经纪人与出售人签订委托协议或有委托意向后,应在第一时间( ),保障客户及自身利益。
A.核实产权
B.进行公证
C.询问最低销售价格
D.收取委托费用