1787年宪法是独立后的美国从邦联发展成为联邦制共和政体,其重要作用是( )
①结束了松散状态,维护了国家统一 ②满足了人民群众多权益的要求
③确立了美国的责任内阁制 ④促进了美国资本主义的发展
A: ①④
B:①②
C:②③
D:③④
根据句意及首字母提示完成单词E____ in our class likes English.I can't stand this t____ weather.I don't like lions because they're u____ .I don't like his new l____ .Wang Lin is the c____ of the basketball team.Look! There are a g____ of children on the beach.The students are taking photos with a c____ .Her mother is tall and a little bit h____ .My sister is a n____ in the hospital.We have many great s____ in the restaurant.
如图甲所示是苏州某路口安装的监控摄像头,它可以拍下违章行驶或发生交通事故时的现场照片,摄像头的镜头相当于一个____ 透镜,它的工作原理与____ (选填“照相机”、“投影仪”或“放大镜”)相似.如图乙和丙是一辆汽车经过路口时与一辆自行车相撞后被先后拍下的两张照片,由图可以看出汽车是逐渐____ (选填“靠近”或“远离”)摄像头.
西亚地区周围的“五海”,不属于海洋的是