读北半球某条纬线图，图上度数表示经度，①――④数字表示四条大河的大致入海口，读图回答关于四条河流河口及其附近自然环境的说法，正确的是A
Passage 2Dear Linda, I have been in England three months now. I hope you don't think I've forgotten you. There have been so many places to see and so many things to do that I've not had much time for
质量相同、温度相同的铁块和铜块，放出相等的热量后，使它们接触，这时铁块将(c铁>c铜)： A.吸热; B.放热; C不吸热也不放热; D.无法
--- What do you think of Jane, Peter? --- It’s not too difficult to get along with her, but sometimes she is too _____ to what people say. A. sensitive B. permanent
“神州”六号载人飞船发射升空。火箭点火起飞，588秒后，飞船与火箭分离，准确入轨，进入椭圆轨道，飞船飞行到第5圈实施变轨，进入圆形轨道绕地
一辆汽车在十字路口等候绿灯，当绿灯亮时汽车以3m/s2的加速度开始行驶，恰在这时一辆自行车以6m/s的速度匀速驶来，从后边赶过汽车。试求： 汽车从
下列物质中既能跟稀H2SO4反应, 又能跟氢氧化钠溶液反应的是①NaHCO3 ②Al2O3③Al(OH)3 ④AlA．③④ B．②③④ C．①③④
，则经过
和
的直线
的方程为______．
和
经过直线
．