【简答题】听对话回答问题。 1. What does the girl want to do tomorrow? A. To stay at home. B. To go boating. C. To go for a drive in the countryside. 2. Why does she want to go there? A. Because her mother likes the cou...
【判断题】作用于刚体的力F,其对刚体内任意一点O的矩,因该力的作用点沿其作用线移动而改变。
【判断题】力F对任意点的矩,因F的作用点沿其作用线移动而改变
【简答题】听对话,根据对话内容选择正确的答案。听三遍。 1. What time are they going to leave? A. Two o'clock. B. Three o'clock. 2. What does the woman like best? A. Playing basketball. B. Playing computer s. 3. What will the woma...
【单选题】(2016.I)若反常积分 收敛,则( )
【判断题】力F对于任意一点之矩,不因该力的作用点沿其作用线移动而改变。