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【单选题】
关于先天性食管裂孔疝的特点，下列错误的是A.
腹腔内脏器(主要是胃)通过膈食管裂进入胸腔所致的疾病
B.
分为滑动型食管裂孔疝、食管旁疝、混合型食管裂孔疝三个类型
C.
引起胃食管反流、食管炎等一系列病理改变
D.
可并发出血、食管狭窄、疝囊嵌顿、疝囊压迫症状
E.
随生长发育，成人阶段症状可逐步减轻甚至消失
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反馈参考答案：
举一反三
【单选题】If a prediction based on a hypothesis is fulfilled, then the hypothesis is confirmed as true.
A.
YES
B.
NO
C.
NOT GIVEN
【单选题】Regarding null hypothesis and alternative hypothesis , which one is wrong ( ).
A.
generally，a null hypothesis state that there’s no difference between the two populations.
B.
null hypothesis and alternative hypothesis are mutually exclusive, and only one can be true.
C.
the alternative hypothesis is effectively the opposite of a null hypothesis
D.
the two hypotheses are certain hypotheses for the sample
E.
the two hypotheses are certain hypotheses for the population
【简答题】试辨认分类编址方式中以下 IP 地址的网络类别
【单选题】is NOT Krashen ’ s hypothesis
A.
The monitor hypothesis
B.
The o ut put hypothesis
C.
The natural order hypothesis
D.
The learning hypothesis
【单选题】短期产量曲线表现为先递增上升,然后递减上升,最后下降,则在生产要素投入的第一阶段
A.
总产出上升，平均产出上升，边际产出上升
B.
总产出上升，平均产出上升，边际产出先上升后下降
C.
总产出上升，平均产出先上升后下降，边际产出先上升后下降
D.
总产出上升，平均产出上先上升后下降，边际产出上升
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