It is _____ work of literature that many people are desperate to have a copy of it. A. so unusual a B. such unusual C. so unusual D. such unusual a
地球公转产生了（ ） A、四季变化 B、昼夜现象 C、昼夜的交替 D、太阳的东升西落
Cl2是纺织工业常用的漂白剂，Na2S2O3可作为漂白布匹后的“脱氯剂”。S2O32—和Cl2反应的产物之一为SO42—。下列说法不正确的（ ） A．该反应中
《周礼》载“金有六齐(配方)，六分其金而锡居一，谓之钟鼎之齐”。这反映了( ) A.甲骨文的雕刻技巧 B.青铜器的铸造
16. When he realized the police had seen him, the man_____the exit as quickly as possible. A. made up B. made for C. made out D. made off
斜面高0.6 m，倾角为37°，质量是1.0 kg的物体由顶端从静止滑至底端，已知动摩擦因数为μ=0.25，g取10 m/s2.求：(1)物体到达底端时的速度.(2)滑行过程中有多
He was＿＿＿today, but was asked to stay for＿＿＿week. A.to have returned；another B.returning；one more C.returned；another D.to return；other
2010年实现人均国内生产总值比2000年翻一番是我国重要的奋斗目标。国内生产总值与国民生产总值的相同点在于（ ） ①两者统计时间通常为一年
的解集在数轴上表示为( )
