从活细胞内分离出来的线粒体放在清水中，不久线粒体就会破裂。破裂情况是 （ ） A．外膜先破裂 B．内膜先破裂 C．外膜与内膜同时破裂 D．外膜与
根据短文内容及首字母提示, 完成下面短文，每空一词。 Jim was a country boy. He was on his （1）w________ to New York to see his grandma. As his parents were very （2）b_____
The winning of hosting _______ 2010 World Expo is _______ victory not only for Shanghai residents, but for ___________ people of the whole Chinese nation. A．the; a; the B．a; the; a
德州市2010年实现生产总值(GDP)1545.35亿元，用科学记数法表示应是_______元．（结果保留3个有效数字）．
It was reported that many helicopters were sent there _________the missing passengers. A. in search of B. in need of
图1表示一个质点运动的v－t图，试求出该质点在3s末、5s末和8s末的速度.
英、法、美资产阶级革命的共同点是：…（ ） A. 推翻了国内的封建王朝 B. 获得了国际援助 C. 进行了反对外国干涉
与
的和仍是一个单项式，则
= 。