监测冰岛火山灰的扩散面积和浓度变化所利用的技术手段主要是( )。
⑴Are you cold? ____
⑵Would you like some fruit? ____
⑶Do you like dumplings? ____
⑷What's your favourite food? ____
⑸What's on the table? ____
A. Dumplings.
B. Yes, I am.
C. My favourite food is meat.
D. Yes, please.
E. Yes, I do.
世界上最湿润的大洲是欧洲。