Last night we met with _________ accident on the way home. A. a quite strange B. too strange an C. such strange an D. a so strange
(2013·北京石景山一模,22题)(16分)如图所示,一轨道固定在竖直平面内,水平ab段粗糙,bcde段光滑,cde段是以O为圆心、半径R=0.4m的一小段圆弧,
如图,在Rt△ABC中,∠B=90°,∠A的平分线交BC于D,E为AB上一点,DE=DC,以D为圆心,以DB的长为半径画圆。 求证:(1)AC是⊙D的切线;(2)AB+EB=AC。
____, the driver looked at the vast desert without knowing if he could get across safely. A. Tired and sad B. Tired and sadly C.Tiredly and sad D.Tiredly and sadly
某校化学兴趣小组的同学在阅读资料时发现,18世纪末,法国科学家拉瓦锡曾经做了这样—个实验:让水蒸气通过一根烧红的枪管,生成了一种气体。同
— A lot of people like throwing litter everywhere. — Something should_________ to make our hometown clean and tidy. A. do B. be done
读某地正午太阳高度和月均降水量年变化图,回答: (1)该地的纬度应为 , 。 (2)在东半球范围内,该地可
某同学在化学学习档案中总结如下规律,其中错误的是( ) A.质子数相同的粒子不一定是同种元素的原子 B.氧化物中含有氧元素,