下列烃的命名哪个是正确的？ (  ) A.
乙基丙烷
B.
2-甲基-3-乙基丁烷
C.
2,2-二甲基-4-异丙基庚烷
D.
3-甲基-2-丁烯

教育过程中最基本、最重要的人际关系______。

填空题教育过程中最基本、最重要的人际关系______。

The evaluation should be conducive to        and      ,...

问答题The evaluation should be conducive to        and      ,reflection and adjustment of their learning process.

An interaction refers to a meeting or communication bet...

判断题An interaction refers to a meeting or communication between only two people.