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【单选题】
上消化道出血最常见的病因是A.
食管静脉曲张破裂出血
B.
消化性溃疡
C.
急性糜烂性胃炎
D.
贲门黏膜撕裂症
E.
胆道疾病
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举一反三
【单选题】Why virtual reality and other technology are used in studying human evolution?
A.
Researchers discussed them and decided to develop these technologies in research.
B.
Internet is widely used and the need for communicating via computers is becoming urgent.
C.
Limited access to original stones and hidden information in inaccessible interior made it necessary.
D.
It will be cheaper and more convenient.
【单选题】Human evolution is a multiisciplinary problem, one of its aspects is the origin and development of human psychological features.
A.
distinct
B.
distinctly
C.
distinctive
D.
distinctively
【单选题】Human evolution is a multidisciplinary problem, one of its aspects is the origin and development of_______ human psychological features.
A.
distinct
B.
distinctly
C.
distinctive
D.
distinctively
【简答题】物体运动状态的改变是指1.物体有静止变为运动或由运动变为静止 2.物体的( )改变 3.( )改变或它们同时改变。要改变物体的运动状态,必须对它施加( )的作用。力对物体的作用效果除了与力的( ),( )有关外还与力的( )有关
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