据中新社北京2010年12月8日电，2010年中国粮食总产量达到546 400 000吨，用科学记数法表示为（ ） A．5.464×107吨 B．5.464×108吨 C．5.464×109吨 D．
The teacher asked more _____ to prevent the students’ eyes from being injured. A. to do B. done C. to be done D. being done
根据首字母填空 1. Do you often take part in your school a________? 2. Alice is alway too s________ to talk in public. 3. He used not to like peking Opera ,but now he is very f________ of it .
孟德斯鸠说：“中国是一个专制的国家。它的原则是恐怖。在最初的那些朝代，政府的专制精神也许稍微差些；但是，今天的情况却正好相反。”下列
图为南半球某岛屿地质地貌示意图，读图完成21-22题。 21、图中矿床所在岩层岩石最有可能是： A．沉积岩 B．变质岩 C．喷出型岩浆岩
Throughout the world, boys and girls prefer to play with different types of toys. Boys typically like to play with cars and trucks, while girls typically choose to play with dolls. Why is this? A t
Lexi Peters, a 14-year-old girl in New York, loves hockey. She’s not only good at playing on her after-school team, but also at playing hockey video games. But when Peters played the popular NHL (Na
第二节 完形填空（共20小题；每小题1分，满分20分） 阅读下面短文，掌握其大意，然后从36~55各题所给的四个选项（A、B、C和D）中，选出最佳选项。 W
