Which of the following statements about computer science and software engineering is correct？__关于计算机科学和软件工程的以下语句哪个是正确的？____（）
A. Computer scientists and software engineers care about the same thing
B. Software engineers always try to find all kinds of solutions for the target software system
Computer scientists’ job is to find the most suitable solution for software system
D. The relationship between Computer Science and Software Engineering is just like the one between Chemistry and Chemical Engineering
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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
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
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