--- Did you at the party, Owen?
--- Yes, I was very happy.
A:enjoyed yourself
B:enjoy yourself
C:enjoy yourselves
D:enjoyed himself
如图所示,质量m=2kg的平板车静止在光滑水平面上.质量M=3kg的小滑块以v0=2m/s的水平速度滑上平板车,滑块与平板车之间的动摩擦因数μ=0.4.平板车足够长,以至滑块不会从平板车上掉下.取g=10m/s2.求
下列函数中,既是偶函数,且在区间(0,+∞)内是单调递增的函数是( )
①我寄愁心与明月____
A.给
B.参加
C.语气词
②烟笼寒水月笼沙____
A.笼子
B.笼罩
③隔江犹唱《后庭花》____
A.还,仍然
B.如同
④自缘身在最高层____
A.因缘
B.因为
⑤何当共剪西窗烛____
A.何时能够
B.怎么能够