现代突发事件的特点包括()
A.不确定性
B.高危害性
C.综合性
D.扩散性
E.多样性
参考答案:A, B, C, D, E
—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
— I really should have gone with you, but I ________ on some remaining problems.
A.was working
B.would work
C.worked
D.had worked
为了健康,建议每日饮用葡萄酒的量是?()
A.<50ml
B.50-100ml
C.200—250ml
D.300ml