以下哪些食物对性功能有一定的促进作用?()
A.人参
B.巧克力
C.燕麦
D.以上都对
参考答案:D
---Where___?
—I got caught in the heavy traffic, or I ___ here earlier.
A.did you go; had arrived
B.are you; was
C.were you; would come
D.have you been ; would have been
艾滋病的传播途径不包括()
A、握手传播
B、性传播
C、血液传播
D、母婴传播