In the following choices, which one cannot be deleted before the calculation of the DOF of a mechanism（）
A. compound pairs
B. passive DOF
C. redundant constraints
D. all of the above
查看答案
Post-writing activities are often used to____（）
A. give students the chance to reread and rewrite with a new perspective
B. relieve teachers’ writing-checking pressure
C. instill in students the awareness of self-assessment and peer-assessment
D. help students form the habit of rewriting and proofreading
Pre-writing activities often used to serve the function of__（）
A. arousing their interest
B. activating their prior knowledge
C. getting them relaxed
D. guiding them to focus on the task
Which of the following are typical speaking activities（）
A. debates
B. interviews
C. communicative games
D. making sentences
When the students can use English to _____, they are better motivated to speak English（）
A. talk about their own life
B. express their own opinions
C. share their own feelings
D. pass written exams
微信支付 
支付宝支付