2011年8月16日,中国第一颗海洋动力环境监测卫星“海洋二号”发射成功,它搭载的传感器不包括()
A、微波散射计
B、雷达高度计
C、微波辐射计
D、合成孔径雷达
参考答案:D
A.To help international students prepare to enter institutions of higher learning.
B.To provide work opportunities for graduating students in the community.
C.To teach students how to use English in their daily lives and at work.
D.To provide from basic communication courses to content-based classes.
A.若磁场正在增强,则电场能正在减少,电容器上极板带正电
B.若磁场正在减弱,则电场能正在增强,电容器上极板带正电
C.振荡电流的变化周期为:2π
D.电场能量的变化周期为:π