_______ New Year’s Eve, people gather at Times Square to see the huge glass _______ through the darkness.

A．On, fall

B．In, falling

C．On, falling

D．At, fall

引起肾脏产生功能性变化的缺血时限是（）。

A.2h之内

B.3h之内

C.4h之内

D.5h之内

E.6h之内