-What ______ do you have for Paul? -I think he should study harder than before. A．news B．advice C．help D．information
根据表中的数据,从电负性的角度判断下列元素之间易形成共价键的一组是( ) 元素NaMgAlHCOCl 电负性0.91.21.52.12.53.53.0 ①Na和Cl ②Mg和Cl ③Al和Cl ④H和O ⑤Al
.【2011·皖南八校第三次联考】B If a business wants to sell its products internationally, it had better do some market research first．This is a lesson that some large American corporati
若顺次连结四边形各边中点所得的四边形是菱形，则原四边形（ ） A．一定是矩形 B．一定是菱形
Our teachers won’t allow to cheat in the examinations.
计算 tan2°tan4°・tan6°…tan88°
--- Our class team is short of one person for the coming basketball match. Why don’t you join us? --- _______. A. Have fun
Few pleasures can equal _______ of a cool drink on a hot day. A. some B. any C. that D. those
