盐析

The effect of the baby boom on the schools helped to make possible a shift in thinking about the role of public education in the 1920’s. In the 1920’s, but especially (1) the Depression of the 1930’s, the United States experienced a (2) birth rate. Then with the prosperity (3) on by the Second World War and the economic boom that followed it, young people married and (4) households earlier and began to (5) larger families than had their (6) during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and 118 in 1955. (7) economics was probably the most important (8) , it is not the only explanation for the baby boom. The increased value placed (9) the idea of the family also helps to (10) this rise in birth rates. The baby boomers began streaming (11) the first grade by the mid-1940’s and became a (12) by 1950. The public school system suddenly found itself (13) The wartime economy meant that few new schools were buih between 1940 and 1945. (14) , large numbers of teachers left their profession during that period for better-paying jobs elsewhere.

(15) , in the 1950’s, the baby boom hit an antiquated and inadequate school system. Consequently, the custodial rhetoric of the 1930’s no longer made (16) ; keeping youths ages sixteen and older out of the labor market by keeping them in school could no longer be a high (17) for an institution unable to find space and staff to teach younger children. With the baby boom, the focus of educators (18) turned toward the lower grades and back to basic academic skills and (19) . The system no longer had much (20) in offering nontraditional, new, and extra services to older youths.

15().

A. Nevertheless

B. Therefore

C. Furthermore

D. Hence fore

毛 * * 在中共七届二中全会上就新民主主义国家的经济成分指出：“国营经济是社会主义性质的，合作社经济是半社会主义性质的，加上私人资本主义，加上个体经济，加上国家和私人合作的国家资本主义经济，这些就是人民共和国的几种主要的经济成分，这些就构成新民主主义的经济形态。”以下对这五种经济成分相互关系的论述正确的有

A．国营经济成分领导其他四种经济成分

B．国家资本主义经济就是国营经济

C．私人资本主义经济与个体经济性质相同

D．合作社经济的前途是国营经济

雅诗兰黛的原品牌吸引年纪较大的群体；而倩碧对于家住郊区.时间紧张的中年母亲最合适；艾维达质优价高适合于新生代。这说明雅诗兰黛在使用（）。

A.无差异营销

B.差异营销

C.集中营销

D.一体化营销

下列程序状态字(PSW)中的( )可以确定能否执行操作系统程序。

A．保护位

B．屏蔽位

C．条件位

D．CPU 状态位

主轴某测量部位，某轴号的净摆度值与直径方向对应轴号的净摆度之差，称为该部位该直径方向上的（）。（

A.摆度；

B.全摆度；

C.净摆度；

D.净全摆度；