20℃时，往50g硝酸钾溶液中加5g硝酸钾晶体搅拌后，尚有部分晶体未溶解，稍加热后晶体全部溶解，下列说法正确的是（）
A：搅拌后，加热前一定是饱和溶液
B：搅拌后，加热前一定是不饱和溶液
C：加热后一定是饱和溶液
D：加热后一定是不饱和溶液
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.
