【多选题】What are the ways to help you listen effectively?
A.
Foucu on the main points
B.
Don't foucus on the details.
C.
If you miss something, don't waste time worrying. Keep listening.
D.
If you are listening to an audio or video files, pause and replay the important or difficult bits.
【单选题】用莫尔法测定地表水中氯离子含量时,可能存在阴离子干扰问题,如何快速检验测定方法是否存在阴离子干扰导致的系统误差?
【单选题】打破原有商品分类,将凉席、灭蚊剂、电风扇等组合成一个新的商品群,这是按( ) 的组合方法。
【单选题】打破原有商品分类,将凉席、灭蚊剂、电风扇等组合成一个新的商品群,这是按( ) 的组合方法。
【单选题】用莫尔法测定Cl-时,干扰测定的阴离子是( )
【单选题】What are the ways to keep a conversation going?