从活动的内容和形式上来说,课外活动具有A.自愿选择性 B.灵活多样性 C.独立自主性 发布时间:2017-06-14 15:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: 从活动的内容和形式上来说,课外活动具有A.自愿选择性B.灵活多样性C.独立自主性D.伸缩广泛性
题型:单项选择题 补全对话。 根据对话内容,从方框内的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项. W: Hi, Li Ming. Where are you going to spend your winter holiday? L: 1. _____ W: How are you going to get there? L: We are going to get there by plane. W: 2. _____ L: Next Monday. W: 3. _____ L: Thanks. What about you? W: 4. _____ I'd like to go back to see my old friends. I miss them very much. L: 5. _____ I think you must have a good time in your hometown. A. That's wonderful! B. Do you go home for the holiday?C. You know I'm from the country.D. I'm sure you'll enjoy yourselves in Yunnan.E. I'm going to travel in Yunnan with my family. F. When are you going to leave for Yunnan? G. Please call me if you need help. 查看答案
题型:单项选择题 如图所示,一长为2L的轻杆中央有一光滑的小孔O,两端各固定质量为2m和m的A、B两个小球,光滑的铁钉穿过小孔垂直钉在竖直的墙壁上,将轻杆从水平位置由静止释放,转到竖直位置,在转动的过程中,忽略一切阻力.下列说法正确的是( )A.杆转到竖直位置时,A、B两球的速度大小相等,为gL3B.杆转到竖直位置时,杆对B球的作用力向上,大小为mg3C.杆转到竖直位置时,B球的机械能减少了4mgL3D.由于忽略一切摩擦阻力,A球机械能一定守恒 查看答案