历史上的南宋文天祥在异族强权面前,正气浩然,风骨铮铮,写下了“人生自古谁无死,留取丹心照汗青”的千古绝唱。他的这种气节反映了当时社会的思想主流是
A:黄老之学
B:佛学
C:程朱理学
D:陆王心学
如图所示,足够长的传送带以恒定的速率v1逆时针运动,一质量为m的物块以大小为v2的初速度从传送带的P点冲上传送带,从此时起到物块再次回到P点的过程中,下列说法正确的是( )
⑴What are you doing?____ A. She will get a present.
⑵What happened to him?____ B. He was lost.
⑶What will Jenny get?____ C. She must hurry up
⑷What must she do?____ D. I'm reading a story book.