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陕西省西安市工业大学附属中学2023-2024学年八年级上学期收心考试英语试题试卷答案
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‘SAD is far more common in northern areas where days can be very short in winter. It influences. morewomen than men and is cusier lo come Lo pcople under the age of 40.If you have got SAD, here are some things you can do to help. First, get more exercise, especiallyoutdoors. Both daylight and cx ercise can make you feel belter. Then, eat right. Having some food rich invitamin D can help lift your spirits. Fish is a good choice.
5.英国数学家贝叶斯(1701-1763)在概率论研究方面成就显著,创立了贝叶斯统计理论,对于统计决策函数、统计推断等做出了重要贡献.根据贝叶斯统计理论,事件A.B,A(A的对立事件)存在如下关系:P(B)=P(B)$$A \right) \cdot P \left( A \right) + P \left( B | \overrightarrow { A } \right) \cdot P \left( \overline { A } \right) .$$.若某地区一种疾病的患病率是0.01,现有一种试剂可以检验被检者是否患病.已知该试剂的准确率为99%,即在被检验者患病的前提下用该试剂检测,有99%的可能呈现阳性;该试剂的误报率为10%,即在被检验者未患病的情况下用该试剂检测,有10%的可能会误报阳性.现随机抽取该地区的一个被 检验者,用该试剂来检验,结果呈现阳性的概率为A. 0.01 B.0.009 9 C.0.1089 D.0.1
15.What are Gerald’s kids doing today?A. Cleaning out their closets.B. Doing their homework.C. Going to the movie theater.
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