酸雨

2007年3月，温 * * * * 在十届人大五次会议上指出要大力抓好节能降耗、保护环境．请你分析并回答下列问题：

（1）“绿色化学”的最大特点在于它是在始端就采用预防实际污染的科学手段，因而过程和终端均为零排放和零污染，具有“原子经济性”．下列化学反应不符合“绿色化学”思想的是______．

A．制备环氧乙烷：2CH₂=CH₂+O₂

催化剂

B．制备硫酸铜：Cu+2H₂SO₄ 

加热  .

 CuSO₄+SO₂↑+2H₂O

C．制备甲醇：2CH₄+O₂ 

催化剂

加热、加压

 2CH₃OH

D．制备硝酸铜：3Cu+8HNO₃（稀）=3Cu（NO₃）₂+2NO↑+4H₂O

（2）冶金废水中含有[Au（CN）₂]^-，其电离出的CN^-有毒，当与H⁺结合生成HCN时，其毒性更强．工业上处理这种废水是在碱性条件下，用NaClO将CN^-氧化为CO₃^2-和一种无毒气体，该反应的方程式为______，在酸性条件下，ClO^-也能将CN^-氧化，但实际处理时却不在酸性条件下进行的主要原因是______．

（3）工业上目前使用两种方法制取乙醛--“乙炔水化法”和“乙烯氧化法”．下面两表提供生产过程中原料、反应条件、原料平衡转化率和产量等的有关信息：

	乙炔水化法	乙烯氧化法
原料	乙炔、水	乙烯、空气
反应条件	HgSO4、100～125℃	PdCl2-CuCl2、100～125℃
平衡转化率	乙炔平衡转化率90%左右	乙烯平衡转化率80%左右
日产量	2.5吨（某设备条件下）	3.6吨（相同设备条件下）

表一：原料、反应条件、平衡转化率、日产量

表二：原料来源生产工艺

	原料生产工艺过程
乙炔	CaCO3 ①850-1100℃ CaO ②+C、电炉 1100℃ CaC2 ③饱和食盐水 C2H2
乙烯	来源于石油裂解气

从两表中分析，现代工业上“乙烯氧化法”将逐步取代“乙炔水化法”的可能原因．

①从产率和产量角度分析______．

②从环境保护和能耗角度分析______．

The popular view when discussing urban transportation in American cities today is to decry its sorry state. Newspapers and journals are filled with talk of an "urban transportation crisis," of the "difficulties of getting from here to there," and so on at great length. Matters are reported to be getting worse—and very quickly. Everyone has his own favorite traumatic experience to report: of the occasion when many of the switches froze on New York’s commuter railroads; of the sneak snowstorm in Boston that converted thirty-minute commuter trips into seven hour ordeals; of the extreme difficulties in Chicago and other Midwestern cities when some particularly heavy and successive snowstorms were endured.
One reason for the talk of an urban transportation crisis in the United States today perhaps lies in a failure to meet anticipations. Many commuters expected to reduce their commuting times as systems improved, but instead found themselves barely able to maintain the status quo in terms of time requirements. Another reason for talk of crisis, almost certainly, is that the rate of improvement in the performance of urban transportation systems during rush hours has been markedly inferior to that expected during off-peak hours. Specifically, the ability to move quickly about American cities during non-rush hours has improved in a truly phenomenal fashion.

居民健康档案编码中最后5位编码为（）。

A.居民家庭序号编码

B.乡镇（街道）编码

C.村委会或居委会编码

D.居民个人序号编码

中央银行对不动产以外的各种耐用消费品的销售融资予以控制，这种货币政策工具是( )。

A．生产者信用控制

B．商业信用控制

C．证券市场信用控制

D．消费者信用控制

孕期保健知识有哪些？