图中的我国东西不之间明暗交界线与我国_______吻合度最高。( )
A: Hello! This is Tom speaking.
B: Sorry, Jack is out at the moment.
A:
B: This is Jack's mother.
A: Hello! Mrs Brown.
B: Of course.
A: That's very kind of you. Would you please tell Jack we will have a party about stamp collection this Sunday morning?
B: Oh, a party about stamp collection on Sunday morning. OK,
A. Who's speaking, please? B. Hold the line, please. C. Can you take a message for me? D. Can I take a message for you? E. I'll tell him as soon as he comes back. F. Could I speak to Joe, please? G. Could I speak to Jack, please? |
①有利于引导学生遵守规则 ②说明遵守社会规则只需要他律
③有利于培养学生责任意识 ④目的是保证学生受教育的权利
①84消毒液的主要成分是(NaClO),标出次氯酸钠(NaClO)中氯元素的化合价。
②洁厕灵的主要成分是盐酸,与84消毒液中的次氯酸钠(NaClO)反应除生成有毒的氯气外,还生成一种生活中常用的盐和一种常见的液体物质,写出该反应的方程式。
①用调好的天平测出软木塞的质量m1;
②将适量的水倒入量筒中,读出水面对应的示数V1;
③用细铁丝将软木塞浸没再装有水的量筒中,过段时间后,读出水面对应的示数V2;
④将软木塞从量筒中取出,直接用调好的天平测出其质量m2.
物理量 | m1/g | V1/cm3 | V2/cm3 | m2/g | 干燥软木塞的密度ρ/g·cm-3 |
测量值 | 6 | 370 |
|