在学生信息表关系Student中, ______ 属性是外键(foreign key

题型:单项选择题

问题:

在学生信息表关系Student中, ______ 属性是外键(foreign key)。

A.学号

B.学生名

C.系号

D.书籍费

考点:计算机等级考试数据库技术三级数据库技术笔试
题型:单项选择题

将购进的药品销售给药品生产企业、药品经营企业、医疗机构的药品经营企业是()。

A.药品经营企业

B.药品生产企业

C.药品经营方式

D.药品经营范围

E.药品批发企业

题型:单项选择题

患者女,66岁,上腹部疼痛、呕吐,呕吐物为胃内容物,发热、呼吸困难10h急诊入院,发病前曾进食油腻食物。入院查T38.6℃,P130次/min,R32次/min,Bp12/7kPa(90.0/52.5mmHg)。

全胃肠外营养应选择()(提示:该患者体重55kg,此时中心静脉压3cmH2O,血三酰甘油9mmol/L,血钙1.2mmol/L,血钾3.0mmol/L,血糖10mmol/L,血白蛋白28g/L。)

A.液体量3000~4000ml

B.液体量1500ml

C.10%葡萄糖液500ml+50%葡萄糖液200ml+普通胰岛素60U

D.10%葡萄糖液500ml+50%葡萄糖液200ml+普通胰岛素20U

E.10%氯化钾20ml

F.10%氯化钾60ml

G.复方氨基酸注射液500~1000ml

H.20%脂肪乳750ml

I.葡萄糖酸钙2g

J.人血清蛋白20g

题型:单项选择题

工业革命中出现的机器生产对服装的直接影响最为明显,()的发明具有划时代的意义。

A.缝纫机

B.蒸汽机

C.化学染料

D.印花

题型:单项选择题

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

题型:单项选择题

()可与内动式蕾形橡胶密封圈配套,用于防挤和减磨。

A、A型挡圈

B、B型挡圈

C、LDN挡圈

D、LW型活塞导向环

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