Many students fail 61 (perform) well in an exam not because they lack ability, but because of the unique pressure of the exam room—the tense atmosphere, the ticking clock on the wall, the t
根据句意和首字母提示补全单词。 66. Mr. Smith can o_____ his guests some coffee or tea when they come to his home. 67. Today, everyone o_____ to be a greener person. 68. I felt a shar
人类在距今约三四百万年前形成，属于“正在形成中的人”指的是 A．坦桑尼亚奥都威峡谷“能人” B．印尼爪哇人 C．德
阅读《大道之行也》，按要求答题。大道之行也，天下为公，选贤与能，讲信修睦。故人不独亲其亲，不独子其子。使老有所终，壮有所用，幼有所长
如图，⊙O的弦AB=8，M是AB的中点，且OM=3，则⊙O的直径CD的长为 。
(1998年全国，3)按下述实验方法制备气体，合理又实用的是( )A.锌粒与稀HNO3反应制备H2B.向饱和NaCl溶液中滴加浓H2SO4制备HClC.亚硫酸钠与浓H2SO4反应制
