创造力的两个主要成分是()
A.创造、想象
B.创造性想象、创造性思维
C.普通的创造力、伟大的创造力
D.幻想、憧憬
参考答案:B
Maggie wanted an evening job that would allow her to ______ her son during the day.
A.look at
B.look around
C.look after
D.look out
两颗人造地球卫星A和B,分别在不同轨道上绕地球做匀速圆周运动,两卫星的轨道半径分别为rA和rB,且rA>rB,则A和B两卫星比较,下列说法正确的是( )
A.卫星A受到地球引力较小
B.卫星A的运行速率较小
C.卫星B的运动周期较大
D.卫星B的向心加速度较小