下列对阴道描述正确的是:
A. 选本身没有分泌功能
B. PH值在3.8-4.5之间
C. 是性交器官
D. 有自浄功能
Which one is not the role of learners in a Total Physical Response class?
A. Listener
B. Performer
Controller
D. Monitor
Which one is not the objectives of the TPR?
A. read and translate its literature
B. oral proficiency at the beginning level
C. basic speaking skills
D. uninhibited communication intelligible to native speakers
TPR is based on the idea that the human brain has a biological program used to acquire any natural language on earth.
A. 对
B. 错
微信支付 
支付宝支付