半径为R的圆桶固定在小车上，有一光滑小球静止在圆桶最低点，如图5－5所示，小车以

三大战役中，“关门打狗”的战役是指( )。

A．辽沈战役

B．渡江战役。

C．平津战役

D．淮海战役

A disk scheduling mechanism in an operatingsystem causes the disk arm to sweepback and forth across the disk surface servicing all requests in its path. This is a

A．First Come First Serve

B．Shortest Seek Time First

C．Scan

D．None of the above

Once you are        , your life will          change!

A．Xperience; truely

B．Xperienced; truly

C．Xperiencing; truly

D．Xperienced; truely

患者腹大胀满，按之如囊裹水，得热则舒，精神困倦，怯寒懒动，尿少便溏，舌苔白腻，脉缓。其症候应为：

A．气滞湿阻

B．痰瘀互结

C．脾虚湿阻

D．寒湿困脾

E．脾肾阳虚