“对发展经济来讲，中国的人民公社化运动和苏俄的战时共产主义政策都是不成功的”。其共同原因是 A．没有把经济建设放在首位 B．过分
下列说法中不正确的是 A．HF稳定性比HCl强 B．Mg失电子能力比Ca弱 C．NaCl与NH4Cl含有的化学键类型相同 D．等物质的
She ________ her hairstyle in her hometown before she came to Chongqing for a better job. A. would change B. has changed C. changed D. was changing
Cheongsam is one of ____ dresses in China. And many foreigners also like it very much. A. traditional
下列杂交组合中，后代只有一种基因型的是 A．Aabb×aabb B．AABb×aabb C．AaBb×AaBb D．AAbb×aaBB
I began to feel in the new school when I saw some familiar faces A .at home B. at heart C .at will D. at sight
cos＋tan＋sin21π的值为________．
我国自主研制的第一颗月球探测卫星“嫦娥一号”的发射成功,标志着我国实施绕月探测工程迈出重要一步。一位勤于思考的同学，为探月宇航员设计了
展开式中
的系数为 .