质量为1kg的物体沿直线运动，其v-t图象如图所示，则此物体在前4s和后4s内受 发布时间：2017-05-14 16:51 │ 来源：www.tikuol.com 题型：选择题 问题： 质量为1kg的物体沿直线运动，其v-t图象如图所示，则此物体在前4s和后4s内受到的合外力冲量为（ ）A．8N•s，8N•sB．8N•s，-8N•sC．0，8N•sD．0，-8N•s
题型：选择题 完形填空。 Most adults once studied at school, had classes and did homework every day. The same 1 is going on at school now. 2 it seems that doing weekend homework is 3 problem for the modern students. All the students should agree that weekend homework should be abolished (取消). It′s 4 for them studying at school five days a week. They have a lot of interests. With homework to do on Saturday and Sunday, when can they find 5 to help around the house, go and see a football or basketball game or agood film, join in family recreations (娱乐), or just have 6 at home? Because of these other activities, the homework can not be finished until 7 . So their weekend homework is usually done in such a hurry that on Monday the 8 teachers often threaten (威胁)to fail whole class of students because they knownothing about the 9 . If there were no weekend homework for the students to do, they would be happy to school on Monday 10 having a good rest and to learn what the teachers teach. ( )1. A. thing ( )2. A. Also ( )3. A. no ( )4. A. not enough ( )5. A. friends ( )6. A. a rest ( )7. A. Monday afternoon( )8. A. pleased ( )9. A. lesson ( )10. A. until B. school B. But B. another B. enough B. time B. an exam B. Saturday afternoon B. sorry B. games B. when C. class C. Still C. one C. no good C. places C. a lesson C. Friday night C. unhappy C. interests C. before D. homework D. Though D. other D. no use D. money D. a picnic D. Sunday night D. not worried D. activities D. after 查看答案
题型：选择题 某派出所所长姜某穿制服在一家饭店二楼吃饭期间，闻知楼下有人打架即去劝解和调停。参与殴斗人之一的杨某在姜某表明身份、鸣枪示警后仍不停手，反而大骂姜某。对方见杨某仍不停手，又和其打起来。杨某突然操起一瓶啤酒，并在桌上敲碎后刺向对方。姜某开枪，击中杨某右肩致其歪倒在地；姜某又向其背部连射两枪，致其当场死亡。请回答下列问题。下列具体行政行为，不属于行政诉讼受案范围的有( )。A．专利复审委员会对中请实用新型和外观设计专利的行政纠纷所作的决定B．行政机关对公民、法人和其他组织之间的民事权益争议所作的调解C．公安机关以公民违反《出境入境管理法》为由对其作出的处罚决定，公民已向上一级公安机关提出中诉的D．公安机关对公民作出的强制收容审查决定 查看答案
