在工业上先经()然后溶剂脱蜡得到的为正序蜡。
A、糠醛精制
B、丙烷脱沥青
C、蜡脱油
D、常减压
参考答案:A
词汇(共5分 每小题1分)
小题1:Mum asked me (not play)near the train station.
小题2:Look!There is a monkey (sit)in the tree.
小题3:I think English is as (important)as match..
小题4:Jane (fall)off the tree last week.
小题5:One (five)of the girls are in red.
脊柱结核的最好发部位()
A.胸椎
B.颈椎
C.腰椎
D.尾椎
E.脊柱胸腰段