南美洲______带范围广阔,年降水量在1000毫米以上,是世界上最_________的大洲。
热;湿润
— "Could we put off the meeting?" she asked.
— "______, "he answered politely."This is the only day everyone is available."[ ]
A. Not likely
B. Not exactly
C. Not nearly
D. Not really
关于绕地球做匀速圆周运动的人造地球卫星,下列说法正确的是( )
A.轨道半径越大,速度越大
B.轨道半径越小,速度越大
C.质量越大,速度越大
D.质量越小,速度越大