【单选题】He smiled at me _____ my help, saying nothing at that moment. [ ]
【单选题】He smiled_______ me.
【简答题】Then he smiled and told me I would receive an______ thousand pounds a year!
【简答题】1)请选用适当的试剂和分离装置除去下列物质中所含的杂质(括号内为杂质),将所选的试剂及装置的编号填入表中。 试剂: a.水 b.溴的CCl 4 溶液 c.溴水 d.NaOH溶液 分离装置: A.分液 B.过滤 C.洗气 D.蒸馏 混合物 需加入的试剂 分离方法 ① 1一氯丙烷 (乙醇) ② 乙烷 (乙烯) ③ 溴化钠溶液(碘化钠) ④ 苯 (苯酚) (2)下列实验能获得成功的是____ ...
【单选题】I thought he would be angry with me,but _________ he smiled.
【简答题】他朝我微笑着,让人感到宽心。 He smiled at me in a way.
【单选题】可用沉淀法除去杂质 (括号内的物质是杂质)的是( )
A.
KNO 3 〔 Ca (NO 3 ) 2 〕
【单选题】气缸失圆度正常时,磨损最大的部位通常在( )