个体水平的变异不可能来源于以下哪个方面。()A、个体真值随时间改变 B、仪器标度或精

题型:单项选择题

问题:

个体水平的变异不可能来源于以下哪个方面。()

A、个体真值随时间改变

B、仪器标度或精密度差

C、抽样方式误差

D、环境因素改变

E、测量者记录误差

考点:卫生人才评价考试流行病学流行病学题库
题型:单项选择题

患者男新,72岁。慢性咳嗽、咳痰20年,活动后气急5年,反复双下肢水肿2年。3天前上述症状加重并出现意识模糊入院。查体:嗜睡、球结膜水肿,口唇发绀,BP120/85mmHg,R26次/分,P106次/分,无颈静脉怒张,双肺可闻干湿啰音,心脏不大,肝脾未触及,双下肢轻度指凹性水肿,双侧腱反射减弱。

提示:入院后给予静脉滴注头孢哌酮+舒巴坦和加替沙星,糖皮质激素,呼吸兴奋剂,纠正电解质紊乱,口服利尿剂等治疗3天后,复查动脉血气和血生化,pH7.40,PaCO255mmHg,PaO272mmHg,HCO3-32mmol/L。Na+134mmol/L,K+3.8mmol/L,Cl-101mmol/L。但患者出现兴奋,失眠。患者出现精神症状的最确切原因是()

A.加替沙星的副作用

B.氧中毒

C.舒巴坦的副作用

D.碱中毒

E.中毒性脑病

F.糖皮质激素的副作用

题型:单项选择题

右肾结石2cm大小,以下哪项不是ESWL治疗的禁忌证()

A.患侧输尿管有狭窄

B.患有严重的心脏疾病

C.患有前列腺增生症

D.患有急性尿路感染

E.伴有双侧输尿管结石

题型:单项选择题

读图,回答下面2题。

小题1:图中反映出的问题是

A.洪涝灾害

B.地面沉降

C.海水入侵

D.大水漫灌小题2:造成图中问题的原因是

A.洪涝灾害

B.地面沉降

C.海水入侵

D.过度开采地下水

题型:单项选择题

做产品搭配时候,自己感觉比较合适就可以搭配在一起,不需要了解产品学习知识。

题型:单项选择题

We once had a poster competition in our fifth grade art class.

"You could win prizes," our teacher told us as she wrote the poster information on the blackboard. She passed out sheets of construction paper while continuing. "The first prize is ten dollars. You just have to make sure that the words on the blackboard appear somewhere on your poster. "

We studied the board critically. Some of us looked with one eye and held up certain colors against the blackboard rocking the sheets to the right or left while we conjured up our designs. Others twisted their hair around their fingers or chewed their erasers while deep in thought. We had plans for that ten- dollar grand prize, each and every one of us. I’m going to spend mine on candies one hopeful would announce while another practiced looking serious wise and rich.

Everyone in the class made a poster. Some of us used parts of those fancy paper napkins, while others used nothing but colored construction paper. Some of us used big designs and some of us preferred to gather our art tidily down in one comer of our poster and let the space draw the viewer’s attention to it. Some of us would wander past the good students’ desks and then return to our own projects with a growing sense of hopelessness. It was yet another grown up trick of the sort they seemed especially fond of making all of us believe we had a fair chance and then always—always—rewarding the same old winners.

I believe I drew a sailboat, but I can’t say that with any certainty. I made it. I admired it. I determined it to be the very best of all of the posters I had seen and then I turned it in.

Minutes passed.

No one came along to give me the grand prize and then someone distracted me and I probably never would have thought about that poster again.

I was still sitting at my desk thinking, what poster When the teacher gave me an envelope with a ten-dollar bill in it and everyone in the class applauded for me.

The underlined phrase in paragraph 3 most probably means ().

A.formed an idea for

B.made an outline for

C.made some space for

D.chose some colors for

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