A:x+3=2m
B:1x=5
C:x=2(x+1)
D:x=3﹣x2
新型的师生关系建立在______基础之上( )
某淘宝网店销售台灯,成本为每个30元.销售大数据分析表明:当每个台灯售价为40元时,平均每月售出600个;若售价每上涨1元,其月销售量就减少20个,若售价每下降1元,其月销售量就增加200个.
We need two students____ (clean)the classroom.
They need help at the old ____ (people)home
Do you make any ____ (friend)here?
Mr.Wang teaches ____(they)math.
Sally is busy ____ (do)her homework.
班级人数一定,每行站的人数和站的行数.