整理资料的四个步骤依次是A．整理分类、复查、核实、比较分析 B．整理分类、比较分析、

下列解释全对的一项是（ ）(2分)

①终鲜兄弟：终于没有兄弟              ②行年四岁：经历了四年

③供养无主：没有主人供养              ④辞不赴命：辞谢不接受任命

⑤日笃：一天一天沉重　　　　⑥日薄西山：太阳接近西山。用日落比喻人的寿命即将终了。

⑦伏帷：伏帷思量。古时下级对上级表示恭敬的用语，奏疏和书信里常用。

⑧死当结草：死后再算帐。

A．①②③④

B．③⑤⑥⑧

C．①④⑥⑦

D．②④⑥⑧

Questions 21-25We are not who we think we are.The American self-image is suffused with the golden glow of opportunity. We think of the United States as a land of unlimited possibility, not so much a classless society but as a place where class is mutable-a place where brains, energy and ambition are what counts, not the circumstances of one’s birth.The Economic Mobility Project, an ambitious research initiative led by Pew Charitable Trusts, looked at the economic fortunes of a large group of families over time, comparing the income of parents in the late 1960s with the income of their children in the late 1990s and early 2000s. Here is the finding: "The ’rags to riches’ story is much more common in Hollywood than on Main Street. Only 6 percent of children born to parents with family income at the very bottom move to the top.That is right, just 6 percent of children born to parents who ranked in the bottom fifth of the study sample, in terms of income, were able to bootstrap their way into the top fifth. Meanwhile, an incredible 42 percent of children born into that lowest quintile are still stuck at the bottom, having been unable to climb a single rung of the income ladder.It is noted that even in Britain-a nation we think of as burdened with a hidebound class system-children who are born poor have a better chance of moving up. When the three studies were released, most reporters focused on the finding that African-Americans born to middle-class or upper middle-class families are earning slightly less, in inflation-adjusted dollars, than did their parents.One of the studies indicates, in fact, that most of the financial gains white families have made in the past three decades can be attributed to the entry of white women into the labor force. This is much less true for African-Americans.The picture that emerges from all the quintiles, correlations and percentages is of a nation in which, overall, "the current generation of adults is better off than the previous one", as one of the studies notes.The median income of the families in the sample group was $55,600 in the late 1960s; their children’s median family income was measured at $71,900. However, this rising tide has not lifted all boats equally. The rich have seen far greater income gains than have the poor.Even more troubling is that our notion of America as the land of opportunity gets little support from the data. Americans move fairly easily up and down the middle rungs of the ladder, but there is "stickiness at the ends" - four out of ten children who are born poor will remain poor, and four out often who are born rich will stay rich.

The word "quintile" (para.4) refers to _______ in the passage.

A．the bottom fifth

B．the study data

C．the sample group

D．the lowest family income

有关合成氨工业的说法中，正确的是 [ ]

A．从合成塔出来的混合气体，其中NH₃只占15%，所以生产氨的工厂的效率都很低

B．由于氨易液化，N₂、H₂在实际生产中是循环使用，所以总体来说氨的产率很高

C．合成氨工业的反应温度控制在500℃，目的是使化学平衡向正反应方向移动

D．合成氨厂采用的压强是2×107Pa~3×107Pa，因为该压强下铁触媒的活性最大

批发、零售企业用于经营销售的能源库存包括（）。

A.购进的、经验收办理完入库手续的商品

B.寄存在外单位的商品

C.盘点中的帐外产品

D.代外单位保管的商品

E.盘亏的商品