B.
只要α<0,则刚体必作减速运动< /div>
C.
当ω<0,α<0,则刚体作减速运动< /div>
【单选题】If only I _____ the books on the reading list before I attended the lecture .
【单选题】At the beginning of this term, our history professor ________ a list of books for us to read.
【单选题】群体规模影响从众行为,研究表明,群体规模一般在()时,影响最大。