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某项目的评估基准日为1994年9月30日，A类建筑物中有一个联合车间，1989年5月竣工交付使用，主体结构为钢屋架、大型屋面板的钢混结构厂房，跨度为18m，层高10m，钢门窗，水泥地面，并设有l0t吊车两台，总建筑面积19600m2。C类建筑中有简易库棚一座，1986年建成，已使用8年。试用年限法对上述房屋成新率进行计算。

答案

参考答案：

解析：使用年限法，用公式表达有以下三种形式： (1)建筑物损耗率＝已使用年限÷建筑物耐用年限×100% (2)建筑物损耗率＝已使用年限÷(已使用年限＋剩余使用年限)×100% (3)建筑物成新率＝1－房屋损耗率 公式(1)用于确定建造时间较短的建筑物，公式(2)用于确定已接近耐用年限或已超过耐用年限的建筑物。 联合车间已使用5年4个月，耐用年限为50年，则 联合车间损耗率＝5.3÷50×100%＝10.6% 联合车间成新率＝1－10.6%＝89.4% 考虑到该车间维护状况良好，故取成新率为90%。 简易库棚的耐用年限为10年，已使用8年，接近耐用年限，经调查了解该厂于1991年进行了一次大修，现在实物状态基本完好，预期尚可使用6年，则 简易库棚损耗率＝8÷(8＋6)×100%＝57% 简易库棚成新率＝1－57%＝43%

单项选择题

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.

1().

A. in

B. for

C. at

D. on
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单项选择题

以下材料哪一个是锅炉专用钢（）。

A.Q235A-F

B.20R

C.20g

D.1Cr13
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