Jane is always _______, so all the guests like her very much.A. careless B. ashamedC. polite
(1)对于下列6种溶液:A.NH4Cl溶液 B.NaCl溶液 C.Na2S溶液 D.NaHCO3溶液 E.Na2CO3溶液 F.AlCl3溶液 , 其中(填写序号) ① 溶液呈酸性的是
— May I smoke here? — No, you__________, only do that in the smoking room. A. can B. need C. mustn't D. couldn't
当冷空气与暖空气相遇时,相对较轻的暖空气被“抬升”,遇冷凝结而产生的降水, 叫( ) A.地形雨 B.对流雨 C.锋面雨
国家图书馆建馆100年来,积极服务于广大读者,见证了国人读书的历程和变化,为我国社会文明进步作出了巨大贡献。到图书馆有偿借阅图书属于 A.劳
一定温度和压强下,1体积X2(气)和3体积Y2(气)化合生成2体积气态化合物,则该化合物的化学式为 A.XY3 B.XY C.X3Y
I can buy________because I don’t have any money__________me. A.something,on B.anything,with C.nothing,in D.nothing,with
(浙江卷文16)已知是平面内的单位向量,若向量满足,则的取值范围是 。