There is orange and banana on the plate.[ ]
A. a; an
B. a; a
C. an; a
答案：C
Whenever I was in trouble, he would do what he could _____ me.
A．help
B．helping
C．to help
D．helped
下列哪项不需要进行手消毒（）
A.脱去无菌手套
B.接触病人血液后
C.接触病人体液后
D.进入和离开隔离病房
E.接触特殊感染病原体后
