— Is ________ your book?
— No. ________ is my book there(那里).
A:that; This
B:this; That
C:that; Those
一艘轮船以速度15m/s匀速运动,它所受到的阻力为1.2×107N,发动机的实际功率是( )
如图,A、B、C、D是圆上的点,∠1=70°,∠A=40°则∠C=____ 度.
风力发电机是将 ____ 能转化成 ____ 能的设备.
I want to use the computer. Can you __________?