【简答题】若排列1 2 7 4 i 5 6 k 9 是偶排列,则i= 。
【简答题】在下面一段文字横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密。每处不超过 15 个字。( 5 分) 二氧化碳是最主要的大气保温气体之一。大气中的二氧化碳浓度升高会导致全球变暖,造成天气干旱或旱涝不均,甚至可能造成海洋水位上升,淹没大量沿海城市, 1 。 然而,也有研究指出, 2 :比如增加的二氧化碳可以给植物“施肥”,有利于植物的生长 。但这必须有个前提,植物还活着!如果土壤被污...
【简答题】若排列 1 2 7 4 i 5 6 k 9 是偶排列,则 i = k= 答案直接填结果
【判断题】一根铁桩,一半埋在土里,一半暴露在潮湿的空气中,由于空气中氧气浓度比土壤中的高,所以,暴露在空气中的铁桩先腐蚀。
【简答题】a narrow escape的汉语意思是________
【判断题】一根铁桩,一半埋在土里,一半暴露在潮湿的空气中,由于空气中氧气浓度比土壤中的高,所以,暴露在空气中的铁桩先腐蚀。 A. √ B. ×
【单选题】In the U. S. , black people often score below white people on intelligence tests. With this in mind, which one of the following statements is not true?
A.
Nature proponents would say that whites are genetically superior to black.
B.
Nurture proponents would disagree that blacks are biologically inferior to whites.
C.
Supporters of the nature theory would say that whites score well because they have a superior environment.
D.
Behaviorists would say that blacks often lack the educational and environmental advantages that whites enjoy.