四年级有25名老师和152名学生参加夏令营活动,成人票每张36元,儿童票每张18元。他们一共要付多少钱
36×25+152×18=3636(元)
Leif followed Biarn’s directions and sailed to _______is believed to be the coast of present-day Canada.
A.which
B.what
C.where
D.that
激冷流程与废锅流程主要区别和特点?