单匝平面载流线圈的面积为0.lm2，通以电流强度为0.4A的电流，该线圈的磁矩大小为______A·m2

自由竞争资本主义时期，资本主义国家对外经济关系的主要内容是（）

The sad condition of women working as house servants around the world received much media_____early this yea

Now that you know all the facts ，you can make an informed___(choose).

资本主义再生产周期的决定性阶段是()