跳伞运动员以5m/s的速度匀速下降,在距地面10m处掉了一颗扣子,跳伞运动员比扣子晚着地的时间为____________。(不计空气阻力对扣子的作用,g取10m/s2)
1s
The Chinese captain was released by Japan finally, __ _nearly a month of detention(扣押), which has seriously harmed the relationship between the two countries.
A.ended
B.ending
C.to end
D.being ended
治疗疳积,应首选()
A.印堂
B.二白
C.太阳
D.四缝
E.八风