问题
多选题
| 甲、乙、丙三辆汽车同时以相同的速度v经过某一路标，此后甲一直做匀速直线运动，乙先加速后减速，丙先减速后加速，它们经过下一个路标时的速度恰好都相等，则（ ） A．甲车先经过下一个路标，乙车次之，丙车最后 B．乙车先经过下一个路标，甲车次之，丙车最后 C．丙车先经过下一个路标，乙车次之，甲车最后 D．三车一定不会同时经过下一个路标 |
答案
BD
搜题请搜索小程序“爱下问搜题”
| 甲、乙、丙三辆汽车同时以相同的速度v经过某一路标，此后甲一直做匀速直线运动，乙先加速后减速，丙先减速后加速，它们经过下一个路标时的速度恰好都相等，则（ ） A．甲车先经过下一个路标，乙车次之，丙车最后 B．乙车先经过下一个路标，甲车次之，丙车最后 C．丙车先经过下一个路标，乙车次之，甲车最后 D．三车一定不会同时经过下一个路标 |
BD
| 完形填空。 | ||||
| Many students have hobbies, such as 1 , painting, growing vegetables in their gardens, or looking 2 animals. Some hobbies are relaxing and 3 are creative. 4 can make you grow as a person, develop your interests and help you learn new skills. David Smith is a student. His hobby is 5 . In senior high school, he wrote a book and it 6 out in 2003. Many teenagers love his book. 7 a result,David has become a successful young 8 . In spite of his great success, David sees writing as only one of 9 many hobbies and interests. "I like playing badminton, too." says David. He isn't sure 10 he is going to write more books in the future. David is very lucky 11 his hobby has brought him 12 and success.But he is 13 in many other things, and he spends time playing badminton for his school team. 14 is something difficult to remember that we shouldn't 15 all our time on our favorite hobby. There are many other interesting things to do in life, and we should try to do something new or difficult. | ||||
|