原式=3+2×22-1=2+2.
They want to some sightseeing in Beijing. [ ]
A. do
B. come
C. go
D. have
“今并味精英,钤其要妙”中“并味”意思是()
A.一起体会
B.同时体会
C.共同获取
D.汇总研究
E.并要研究