In our childhood, we were often ____ by Grandma to pay attention to our table manners. A. demanded B. reminded C. allowed D. hoped
—Sally, could you go and help your father wash the car?—Why ____________? I’m busy now. Amy is lying on the grass doing nothing.A．meB．I C．himD．her
读下图，回答下面试题。 该城市大气SO2地面浓度最大的区域，其污染物来源可能是 （ ） A．生活和取暖排放的废气
在下列反应中，氧化剂和还原剂为同一种物质的是( ) A．2Na＋2H2O===2NaOH＋H2↑ B．MnO2＋4HCl(浓)MnCl2＋2H2O＋Cl2↑ C．Na2CO3＋CO2＋H2O===2NaHCO3 D．2Na2O2＋2CO2===2Na
马克思说： “希腊的内部极盛时期是伯里克利时代。”这一时代，雅典 A．法律体系健全 B．成为希腊霸主 c．自然科学发达
Dear Ralph, I am an university student. I once thought life at the university must be excellent, but now I changed my mind. I have three roommates, and I was the last one to move into the dormitory
目前，我国正在大力扶持燃气汽车的发展，原因是 A．我国天然气储量居丰富 B．我国石油资源短缺 C．世界油价上涨 D．缓解大气污染和汽车能源紧
调性求函数
上的最大值
