“取于民，用于民，福祉同谋，千溪活水盈沧海；征以法，纳以法，和谐共建，一片冰心在

（12分）A、B、C、D四种物质中均含有氯元素。

①室温下单质A与某种常见一元强碱溶液反应，可得到B和C。B的焰色反应为黄色，C是84消毒液的有效成分。

②化合物D受热催化分解，可制得一种气体，该气体能使带火星的木条复燃。

(1)写出A、B、C、D的名称：

A、_______________B、_______________C、_______________D、_______________

（2）写出①中的化学反应方程式：_______________________________

（3）写出②中的化学反应方程式：_______________________________

今天是周末，他起得比平时晚得多。

Although no longer slavers after the Civil War, American blacks took no significant part in the life of white America except as servants or laborers. Many thousands of them emigrated from the war-ravaged South to the North from 1865 to 1915 in the hope of finding work in the big industrial cities. Whole communities of blacks crowded together into ghettos in New York City, Chicago and Detroit, where once the poor white immigrants had lived. These ghettos, neglected by the city authorities, became slums. The schools to which black children went were hopelessly inadequate. Unemployment in black ghettos remained consistently higher than in white communities.

41. Serious problems with black ghettos.__________

Stable family life was difficult to maintain.

42. The extreme poverty of the blacks. __________

In the late 1970s, nearly a third of all blacks still belonged to the so-called "underclass", they are so "under-privileged" and poor that they cannot seize the opportunity for advancement.

43. Efforts to put an end to racial discrimination. __________

Race relations in the USA continue to be a thorny problem.

44. Improvements in lives of the blacks. __________

Despite some setbacks, race relations are improving.

45. Prevailing violence in solving racial problems. __________

It is said that television had an enormous influence on frustrated and bitter blacks, for it showed them bow much better whites on the whole lived than blacks. At the end of the 1960s, there were serious riots in many cities.

The violence quickly died down. Blacks began to use their votes to exert political pressure. Cities like Atlanta (Georgia), Gary (Indiana), and Los Angeles (California) elected black mayors. Integration of schools, despite resistance from white groups, goes on, and the proportion of blacks in American colleges has increased dramatically in the last 20 years. There are reasons to maintain a cautious optimism that progress in race relations will continue.

[A] It has been estimated that there are more than 20 million Americans in this category, 10% of the population, including many millions of whites.

[B] Blacks are gaining in self-confidence. In more and more areas they are winning control of their communities, and their standard of living is going up faster than that of the poor whites. It is still a hard struggle. There is still prejudice and even some hatred, but in most walks of American life there are now more blacks than ever before.

[C] The era of blatant discrimination ended in the 1960s through the courageous actions of thousands of blacks participating in peaceful marches and sitins, to force Southern states to implement the Federal desegregation laws in schools and public accommodations. Down came the "whites only" notices in bused, hotels, trains, restaurants, sporting events, restrooms and on park benches that once could be found everywhere throughout the South. Gone were the restrictions that prevented blacks voting. Gone, too, were the hideous lynch-ings, which since the Civil War had caused the death of thousands of innocent blacks— hanged without trial by white mobs. However, even today, poor, uneducated lacks do not always receive the same degree of justice that the more affluent and better educated can expect.

[D] Many blacks chose to keep silent about their unfairness instead of resorting to violence. But their silence was also problem provoking: on the one hand, silence would build up a lot of complaints and hatred in their minds, thus resulting in a negative approach to life and everything; on the other hand, silence would give the whites an impression that the blacks take the reality for granted and put more racial discrimination on them.

[E] Unemployed fathers would on occasion walk out of their homes and never return. Children neglected by their parents turned in some instances to drugs and crimes. There are more than 700 murders a year in cities like New York, Detroit, Los Angeles and Houston, and most of these deaths are of blacks killed by blacks. The black ghettos are dangerous both for blacks and non-blacks.

[F] Radical blacks like the Black Panthers demanded a free black state within the Union, and advocated violence to achieve that end and to protect themselves against what they felt was police brutality toward blacks. For a while, violence overshadowed the influence of the greatly respected pacifist black, Martin Luther King, Jr. , who had provided the inspiration and leadership for those devoted to a peaceful change and whose murder in 1968 stunned America.

41（）

孔隙水压力

水龙带摆动并伴有水击杂音发生不必检查（）。

A.钻井液是否气侵

B.吸入管线是否漏气

C.吸入管高点处可能有气袋

D.钻井液温度