A conference is going on in your employer's office. The secretary to one of the people in the meeting calls and says she has a very important message for her boss and must talk with him.
A.
Enter the office and tell the person involved.
B.
Ask the secretary to wait, and give the person a note.
C.
Switch the call immediately to your employer's office.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】某同学要配制0.2mol/LNa 2 SO 4 溶液500mL,请完成下列问题: (1)需要Na 2 SO 4 固体的质量为____________g (2)配制时,正确的操作顺序是(用字母表示,每个字母只能用一次)______________ A.用30mL水洗涤烧杯2~3次,洗涤液均注入容量瓶,振荡 B.用托盘天平准确称量Na 2 SO 4 固体,在烧杯中用少量水溶解 C.将容量瓶盖紧,振荡,...