一日中,若24次定时记录有缺测时,该日按02、08、14、21时四次定时记录作日平均

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问题:

一日中,若24次定时记录有缺测时,该日按02、08、14、21时四次定时记录作日平均;若四次定时记录缺测()次或以上、但该日各定时记录缺测()次或以下时,按实有记录作日统计;缺测()次或以上时,不作日平均,但该日其它各定时记录仍参加各定时的候、旬、月平均值统计。

考点:地面气象测报上岗考试地面气象测报上岗考试题库
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一家商店将某种商品按成本价提高40%后标价,元旦期间,欲打八折销售,以答谢新老顾客对本商厦的光顾,售价为224元,这件商品的成本价是多少元?

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决定导体电阻大小的因素是()。

A、导体的材料、长度、横截面积

B、通过导体的电流强度

C、导体的电功率

D、加在导体两端的电压

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Beyond the Factory: Child Labor in the Cities

At the beginning of the nineteenth century, factory owners faced few restrictions on the way they employed their children workers, who were between the age of 7 and 12. Gradually laws came into being.

The first child-labor laws were passed at the state level in America and usually focused on both required education and a minimum age for employment. And added rules limited the length of the workday for children. Pennsylvania, for example, limited the workday to 10 hours for children under 12. However, government officials cared little whether businesses followed the law. In fact one group of children was left entirely unprotected by labor laws -- the children of immigrant families.

By the beginning of the twentieth century, piecework appeared, for which people were paid by the piece. Significant numbers of women sewed baby dresses or men's neckties and made the artificial flowers used to decorate hats. Piecework turned homes into factories that were free from the law, and countless children worked long hours alongside their mothers and old sisters.

Manufactures exploited the system shamelessly and paid the lowest wages they could. Embroidering (刺绣) a silk dress, which was a 10-day job, might generate a five-dollar payment. In the case of "willowing", workers needed to add more strands to ostrich feathers used on hats to make them longer and more graceful. The first willowers were paid 15 cents per inch, but a few months later, the pay was reduced to 13 cents. Within three years, willowers were earning only three cents per inch.

In order to survive under these circumstances, pieceworkers had even their youngest children help them. In one Italian neighborhood, a three-year-old girl helped her mother sew clothes. In another case, a child of eight who had lived in New York for three years had never been to school at all and could speak almost no English. Slowly child labor laws brought these abuses to an end.

31. The first child-labor laws required ______.

A. workplace safety and conditions

B. minimum payment and age

C. education and working time

D. minimum payment and schooling

32. Manufactures who hired women to do piecework ______.

A. were kind and concerned employers

B. were sometimes called "willowers"

C. usually paid the lowest salary

D. forced children to turn home into factories

33. "Willowing" was a kind of ______.

A. handwork activity           B. workplace

C. payment requirement              D. workers

34. By raising the example of the three-year-old girl's experience in the last paragraph, the author intended to ______.

A. show how poor the situations were for children workers

B. blame those adult pieceworkers for allowing children to work

C. attract attention to protect young children

D. emphasize the importance of educating young children

35. Which of the following sentences best summarizes the passage?

A. The first child-labor laws were limited due to working at the state level.

B. Early child-labor laws offered no protection to children who worked at home.

C. Some immigrant children did not learn English because of their piecework.

D. Child-labor laws should have come into being before children became workers.

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血清蛋白电泳时,泳动最慢的蛋白是()。

A.γ球蛋白

B.M蛋白

C.β球蛋白

D.α2球蛋白

E.α1球蛋白

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国家预算既是保障国家机器运转的物质条件,又是政府实施各项社会经济政策的有效保证,体现的是国家预算的()。

A.制约作用

B.反映监督作用

C.调节作用

D.财力保证作用

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