如图、在△ABC中，∠C＝90°，∠B＝60°，BC＝3，以C为圆心，r为半径作⊙C，如果点B在圆内，而点A在圆外，那么r的取值范围是
Lying in the sun on a rock, the cougar(美洲狮)saw Jeb and his son, Tom before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the co
Joe Simpson and Simon Yates were the first people to climb the West Face of the Siula Grande in the Andes mountains. They reached the top 41 , but on their way back conditions were ver
实验室将NH3通入AlCl3溶液中制备Al(OH)3，经过滤、洗涤、灼烧后得到Al2O3，下列图示装置和原理均合理的是( ) A．用装置甲制取 NH3 B．用装置乙制
2010年1月22日，江苏省宣布自2月1日起提高最低工资标准。其后，许多省份陆续提高了最低工资标准。这表明了政府 ① 提高劳动报酬在初次分配中的比重
为了探究植物呼吸作用强度的变化规律，研究者在遮光状态下，相同的新鲜菠菜叶在不同温度和O2浓度的条件下的CO2释放量，结果如表中数据所示。下列
Mr. Lewis was a dance teacher. He was a nice man and always had a lot of students. One year he moved to a new town, and was soon teaching many students in the dance school there, but he decided to mov
唐诗载：“自从贵主和亲后，一半胡风似汉家”，正确反映了 A．吐蕃强大的原因 B．吐蕃衰落的原因 C．唐文化对吐蕃破
