下图为节日里悬挂灯笼的一种方式，A、B点等高，O为结点，轻绳AO、BO长度相等，拉力分别为FA 、FB，灯笼受到的重力为 G．下列表述正确的是 A．
下图示意某地的沉积岩层与火成岩体的相互关系。则各岩层、岩体的生成时代按由老至新的顺序依次是（ ） A．火成岩1、沉积岩1、沉积岩2、火成
目前，广州市重点发展的工业是（ ） A.原材料工业和装备制造业 B.电子、通信 C.轻纺、化工
Ralph and Norton can grow to be 40 feet long and live in a tank as large as a football field. What are they? They’re the only two whale sharks at a North American aquarium （水族馆） You can
Her brother was _______ by the army because of his bad eyesight. A. promoted B. accepted C. rejected D. served
根据短文内容判断正(T)误(F) A man and his cat A man has a cat. He likes her very much. At meal time the cat sits at the table with him. The man eats wit
下列说法正确的是（ ） A．缺乏维生素A会引起坏血病 B．缺铁会引起甲状腺肿 C．大米富含糖类 D．蔬菜中含大量蛋白质
一曲凄怆的《松花江上》当年曾传唱大江南北，唱出了东北人民流离失所、家破人亡的悲痛之情。它所反映的东北人民的苦难历史始于 A.九一八事变
