【单选题】【消耗次数：1】
根据循证医学，下列哪一项是证据水平为I级的证据（）
①
队列研究的系统
②
专家的会诊意见
③
随机对照临床试验的系统综述
④
病例对照的系统综述
参考答案：
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相关题目
【简答题】
比较病例对照研究和队列研究的异同点。
【单选题】
一项吸烟与肺癌关系的病例对照研究结果显示χ2=12．36， P0.05，OR=3．3，正确的结论为
①
病例组肺癌的患病率明显大于对照组
②
病例组吸烟的暴露比值明显大于对照组
③
对照组发生肺癌的可能性明显大于病例组
④
对照组肺癌的患病率明显小于病例组
【简答题】
简述临床试验和队列研究的异同点。
随机题目
【单选题】
<img title=1行列式.png alt=1行列式.png src=https://huaweicloudobs.ahjxjy.cn/35C48936EBB6D9AC6C9FC8B9A8DDDFEE.png/>
①
m+n
②
-(m+n)
③
n-m
④
m-n
【单选题】
<img title=6.png alt=6.png src=https://huaweicloudobs.ahjxjy.cn/43B61C7141C3B0829ED0C03ACCA7264A.png/>
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10
②
-10
③
8
④
-8
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/1C15C678338B379303C998EB6D7A948A.png" title="1.png" alt="1.png"/>[填空]
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/A793623C0A1154C6652EA4D7CC351C58.png" title="2.png" alt="2.png"/>[填空]
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/4CF96D45259A24DA74853BB7A91E222E.png" title="6.png" alt="6.png"/>
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Translate the following sentence into Chinese.The way of online learning will much benefit everyone at work in the long run.
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Translate the following sentence into Chinese.In fact, it has nothing to do with him at all.