The lack of movement caused the player’s muscles to _______ and he might never play the sport again.

A．hurt

B．ruin

C．weaken

D．threaten

肾小体血管球的血管是（）。

A.血窦

B.有孔毛细血管

C.连续毛细血管

D.毛细血管后微静脉

E.以上都不是