队列研究() A.只能计算比值比来估计相对危险度 B.不能计算相对危险度 C.不能计

题型:单项选择题

问题:

队列研究()

A.只能计算比值比来估计相对危险度

B.不能计算相对危险度

C.不能计算特异危险度

D.既可计算相对危险度,又可计算特异危险度

E.既不能计算特异危险度,也不能计算相对危险度

考点:北京住院医师公共卫生学Ⅰ阶段北京住院医师公共卫生学(综合练习)北京住院医师公共卫生学(综合练习)题库
题型:单项选择题

阅读理解。

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题型:单项选择题

胆管细胞囊腺癌CT表现不包括

A.实质部分为低密度

B.囊壁厚薄不均

C.可见囊壁结节

D.囊内液体密度

E.病变显著强化

题型:单项选择题

“碘钟”实验中,3I-+ S2O32- = I3-+2SO42-的反应速率可以用I3-与加入的淀粉溶液显蓝色的时间t来度量,

t越小,反应速率越大。某探究性学习小组在20℃进行实验,得到数据如下表

回答下列问题:

(1)该实验的目的是___________。

(2)显色时间t1=____________

(3)温度对该反应的反应速率的影响符合一般规律,若在40℃下进行编号③对应浓度的实验,显色时间t2的范围为__________(填字母)。

A.<22s B.22-44s C.>44s D.数据不足,无法判断

(4)通过分析比较上表数据,得到的结论是_________________。

题型:单项选择题

在胶质层指数测定试验中,如果胶质体的透气性很好,则体积曲线的形状是()。

A.平滑下降型

B.之字型

C.山型

D.微波

题型:单项选择题

1602年,明末思想家李贽在狱中自尽身亡。阅读下列材料,回答问题。

材料一

穿衣吃饭即是人伦物理……非衣饭之外更有所谓种种绝与百姓不相同者也。

——李贽《焚书》

材料二

夫童心者,绝假纯真,最初一念之本也。若失却童真,便失却真心;失却真心,便失却真人……故谓人有男女则可,谓见(见:见识)有男女;岂可乎?谓见有长短则可,谓男子见尽长,女子见尽短,又岂可乎?

——李贽《焚书》

材料三

李贽虽在麻城,但有无数来自各地的追随者,几使麻城一境如狂,他的“异端”思想由此广泛传播。与此同时,麻城乃至京城的保守势力对李贽的迫害也逐渐升级,……最终经神宗御批,以“敢倡乱德,或世诬陷民”的罪名逮捕下狱,并焚毁其著作。不愿屈服的李贽在狱中赋诗:“志士不忘在沟壑,勇士不忘丧其元;我今不死更何待,愿早一命归黄泉。”随后自杀身亡。

——袁行霈《中华文明史》

请回答:

据材料一、二,概括李贽的基本主张,指出这些主张产生的时代背景。

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