The first step to teaching speaking is to __________________.
A. get students familiar with the topic they are going to practice
B. expose students to a text
C. practice vocabulary, functional language
查看答案
The characteristics of a successful speaking activity are :________,_______,________.
Create opportunities for Ss to speak whenever possible.
A. 对
B. 错
线粒体各部位都有其特异的标志酶,内膜是____、外膜是____、膜间隙是____、基质是____
线粒体和叶绿体都具有环状DNA及自身转录RNA与转译蛋白质的体系。
A. 对
B. 错