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_________________________(不少于30位) of his colleagues signed the letter.

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假设订货管理数据库中有3个表,仓库.DBF、职工.DBF和订购单.DBF,它们的结构分别如下: 仓库表(仓库号C(4),城市C(10),面积I(4)) 职工表(仓库号C(4),职工号C(4),工资Y) 订购单表(职工号C(4),供应商号C(3),订购单号C(6),订购日期D,总金额Y) 检索工资多于1200元的职工号,请对下面的SQL语句填空。 SELECT职工号; FROM (10) ; WHERE工资>1200 检索在仓库"E23”或"W32”工作,并且工资少于2000元的职工号,请对下面的SQL语句填空。 SELECT 职工号 FROM 职工; WHERE 工资<2000 (11) 检索工资大于2000元的职工所管理的仓库的平均面积,及其中的最大面积和最小面积。请对下面的SQL语句填空。 SELECT (12) ,MAX(面积),MIN(面积); FROM 仓库 WHERE 仓库号 (13) ; (SELECT (14) FROM 职工 WHERE 工资>=2000) 检索每个仓库至少有3名职工的工资总额。请对下面的SQL语句填空。 SELECT 仓库号,COUNT(*),SUM(工资)FROM 职工; GROUP BY 仓库号; (15) >=3

What kind of people can now find a job as an English teacher __________________.

增值税具有什么作用

As we have seen, the focus of medical care in our society has been shifting from curing disease to preventing disease — especially in terms of changing our many unhealthy behaviors, such as poor eating habits, smoking, and failure to exercise. The line of thought involved in this shift can be pursued further. Imagine a person who is about the right weight, but does not eat very nutritious (有影响的) foods, who feels OK but exercises only occasionally, who goes to work every day, but is not an outstanding worker, who drinks a few beers at home most nights but does not drive while drunk, and who has no chest pains or abnormal blood counts, but sleeps a lot and often feels tired. This person is not ill. He may not even be at risk for any particular disease. But we can imagine that this person could be a lot healthier. The field of medicine has not traditionally distinguished between someone who is merely "not ill" and someone who is in excellent health and pays attention to the body’’s special needs. Both types have simply been called " well." In recent years, however, some health specialists have begun to apply the terms "well" and "wellness" only to those who are actively striving to maintain and improve their health. People who are well are concerned with nutrition and exercise, and they make a point of monitoring their body’’s condition. Most important, perhaps, people who are well take active responsibility for all matters related to their health. Even people who have a physical disease or handicap (缺陷) may be "well," in this new sense, if they make an effort to maintain the best possible health they can in the face of their physical limitations. "Wellness" may perhaps best be viewed not as a state that people can achieve, but as an ideal that people can strive for. People who are well are likely to be better able to resist disease and to fight disease when it strikes. And by focusing attention on healthy ways of living, the concept of wellness can have a beneficial impact on the ways in which people face the challenges of daily life. According to what the author advocates, which of the following groups of people would be considered healthy

A. People who have strong muscles as well as slim figures.
B. People who are not presently experiencing any symptoms of disease.
C. People who try to be as healthy as possible, regardless of their limitations.
D. People who can recover from illness even without seeking medical care.

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