引起休克的最主要原因是（）。

A.血容量减少

B.血液回流障碍

C.血管容积增加

D.心排出量减少

E.有效循环血量减少

1) ______ the Oral Approach
2) ______ the Cognitive Approach
3) ______ the Audiolingual Method
4) ______ the Natural Approach
5) ______ the Communicative Approach
a) Dictation, imitation and controlled oral-based reading and writing tasks.
b) Dialogues and pattern practice form the basis of the classroom practice.
c) The first step in the classroom is to present all new sounds, vocabulary and structures in a manner meaningful to each student.
d) In the early stages of speech production, it uses random volunteered group response, which place little demand on the individual student but allow early use of the target language.
e) Developing listening and note-taking skills using audio-video materials; giving oral presentation; project work; role-play and simulation.