A:
B:
C:
D:
某航母跑道长200m,飞机在航母跑道上加速时,飞机发动机产生的最大加速度为6m/s2,起飞需要的最低速度为50m/s,通过计算判断,飞机能否靠自身发动机从舰上起飞?
为了使在开始滑行时具有一定的初速度,航空母舰装有弹射装置.那么,飞机在滑行前,需要借助弹射系统获得的最小初速度为多少?
把构成植物体的几种重要组织与他们的主要分布用线连接起来.
①保护组织____ A.根尖的分生区、芽的生长点灯
②营养组织____ B.植物体内的导管、筛管等
③输导组织____ C.根、茎、叶的表皮等
④分生组织____ D.果肉、叶肉、幼能茎等
I am Brad. I like scary movies and action movies. My favorite movie star is Jackie Chan. I think Jackie Chan is a great actor. He has a movie Who am I? It's a very successful action movie. It's exciting.
My name is Kelly. I am a girl. I like comedies and soap operas, but I don't like scary movies. I think they are scary. I think Beijing Opera is educational. On weekend, I often go to see it with my father. I can learn a lot about Chinese history.
I am Carlos. My favorite cartoon star is Mickey. I think Mickey Mouse is a great cartoon. I also like scary movies. I think they are very exciting.
I'm a girl. My name is Mary. On weekends, I often watch cartoons and talent shows on TV. I think they are wonderful and relaxing. I don't like sitcoms. They are boring.
根据表格内容,选择最佳答案。