InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.

Ataskofthepostofficestaffisto_(class)mailaccordingtotheplacesitistogo

言行一致是一个人立身处世的基础

Thefixedstarwasaplanet.（）

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