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【单选题】
病人,女,42岁,3小时前突发呕血800ml,随后黑便2次,大约400ml,晕厥一次而来急诊。BP80/56mmHg,P118次/分,面色苍白。追问病人病史,有乙型肝炎史6年,查体:巩膜,腹稍膨隆,可见2条腹壁静脉曲张,移动性浊音(+)。该病人最有可能的出血原因是A.
胆道出血
B.
急性出血性胃炎
C.
消化性溃疡
D.
食管胃低静脉曲张破裂
E.
食管贲门粘膜撕裂综合征
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举一反三
【简答题】β-折叠片结构的维持主要依靠两条肽键之间的肽键形成________来维持。（低阶）
【简答题】中国第一位获得诺贝尔文学奖的作家是
【简答题】β-折叠片结构的维持主要依靠两条肽键之间的肽键形成______来维持。
【单选题】Man: Did you take your children out last weekend? Woman: Yes. And they had the time of their lives at the amusement park. Question: What can we learn about the children in the amusement park?
A.
The children enjoyed themselves very much.
B.
They had a good time for the first time in their lives.
C.
They were met with 3 dangerous situation.
D.
They were amused with some breathtaking games.