题型:问答题 简答题 男女同学之间应进行正常、健康的交往。以下男女同学之间的交往错误或不妥的是 [ ]①小雯从不接受男生单独的邀请,她愿意跟多数男生打交道 ②小贾同学经常向“哥们儿”炫耀他交的异性朋友最多、最漂亮 ③小英只跟身材高大,家庭富裕的男生交往 ④“班花”小雪经常以影响学业为由拒收男生的“求爱信” A.①③ B.②④ C.②③ D.①②③ 查看答案
题型:问答题 简答题 下表列出了四种溶液溶质的质量分数和物质的量浓度数值:溶质HClHNO3CH3COOHNaOH溶质的质量分数/%36.5634040物质的量浓度/mol·L-111.813.810.614.3则各溶液中密度最小的是()A.HClB.HNO3C.CH3COOHD.NaOH 查看答案
题型:问答题 简答题 Can you tell me ______ at that time? [ ]A. what were they doing B. what they were doingC. what are they doing D. what they are doing 查看答案