—Which is more popular, Yao Ming or Liu Xiang?

—I think              them are popular with us. [ ]

A. either of

B. none of

C. both of

D. all of

膝跳反射的感受器和效应器分别在[ ]

A．膝盖上位韧带和腓肠肌

B．膝盖下位韧带和腓肠肌

C．膝盖下位韧带和股四头肌

D．膝盖上位韧带和股四头肌