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问题 单项选择题

男，6岁，反复咳嗽、咳痰2年，痰中带血丝1个月。右肺底部固定粗、中湿性啰音，咳痰后可消失。最可能的诊断是

A．支气管炎

B．肺脓肿

C．特发性肺含铁血黄素沉着症

D．支气管扩张

E．肺动静脉瘘

答案

参考答案：D

解析：支气管扩张临床表现为咳嗽、咳痰，痰中带血。肺底可闻及固定粗、中湿性啰音，咳痰后可消失。

填空题

Motivation is "the driving force within individuals that impels them to action." And goals are the sought-after results (1) motivated behavior.
Motivation can be either positive or negative (2) direction. We may feel a driving force toward some object or condition, (3) a driving force away from some object or condition. For example, a person may be impelled toward a restaurant to fulfill a need, hunger, and away (4) an airplane to fulfill a need of safety. Some psychologists refer to positive drives (5) needs, wants or desires, (6) negative drives as fears or aversions. (7) , though negative and positive motivational forces seem to differ dramatically (8) terms of physical and sometimes emotional activity, they are basically similar in (9) they both serve to initiate and sustain human behavior. (10) this reason, researchers often refer (11) both kinds of drives or motives as needs, wants and desires.
Goals, (12) , can be either positive or negative. A positive goal is one toward (13) behavior is directed and it is often referred to as an approach object. A negative goal is (14) from which behavior is directed away and it is sometimes referred to as an avoidance object. Since both approach and avoidance goals can be considered objectives of motivated behavior, most researchers refer to (15) types simply as goals. Consider this example. A middle-aged woman may wish to remain (16) attractive as possible. Her positive goal is to appear desirable, and (17) she may use a perfume advertised to make her irresistible. A negative goal may be to prevent her skin (18) aging, and therefore she may buy and use face creams. (19) the former case, she uses perfume to help her achieve her positive goal -- attractiveness; in the (20) case, she uses face creams to help avoid a negative goal -- wrinkled skin.
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多项选择题

数据库中有表Table_priceHistory表，结构如下表所示：

字段 字段名 数据类型 可否为空 单位 备注
ID 商品编号 VARCHAR（8） 不允许 主码
GoodsName 商品名称 VARCHAR(20) 不允许
StartDate 价格生效日期 DATETIME 不允许 主码
EndDate 价格失效日期 DATETIME 不允许 主码，晚于StartDate
SaleUnitPrice 单价 MONEY 不允许 元
①写出创建Teachers表的SQL语句，要求语句中包含所有的约束。
② 现要查询单价最高的前三种商品的商品编号，商品名称和单价(使用TOP语句)
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