安徽天柱山山体主要由燕山期花岗岩组成，其花岗岩峰丛地貌景观奇特，主峰天柱峰（图4）如巨柱擎天，飞来峰（图5）上飞来石如天外来客（图6），
漫画《陷阱》给我们的警示是（ ）A．明辨是非，拒绝不良诱惑B．免费的东西都是骗人的C．上当受骗都是因为免费的东西太诱惑人了D．生活中处处是
在一对相对性状的的遗传实验中，性状分离是指（ ） A 纯种显性个体与纯种隐性个体杂交产生显性的后代 B 杂种显性个体与纯种显性个体杂交
下列计算正确的是 ( ) A. ＋＝ B. －＝0 C. ・＝9
下列各元素中，一定属于主族元素的是 A．X元素能形成+7价的含氧酸及其盐 B．Y元素原子核最外层电子数为2 C．Z元素的阴离子与同一周期惰性元素的
The old farmer, _____ the badly injured and burnt soldier, came out of the burning farmhouse, calling continuously for help. A. supporting B. having supported C. being supported by
函数的图像如图所示，的导函数，则下列数值排序正确的是（ ） A． B． C． D．
other, move, enough, find ,desert, make, use , another, friend , carry , trouble
other, move, enough, find ,desert, make, use , another, friend , carry , trouble, friend You may think there is nothing but sand in the desert of the world, but it is not true. In the desert we can
