【单选题】SO 2 主要是含硫的煤和石油中( )的燃烧产生的。
【单选题】Windy: I’m going to Sanya for summer vacation. Will: __________________.
A.
You’d better take some warm clothes.
B.
You take some warm clothes.
C.
You’d better take the sun cream.
D.
You would better take the sun cream.
【简答题】与图解法相比,解析法作机构运动分析的优点是什么?
【单选题】Nancy:Do you fancy going out for a walk? Windy:I’d love to, but I’m afraid ______________.