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【判断题】
儿童患夜盲症的原因是身体缺乏维生素A。A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】披袖绊(背步披袖)的动作要领和要点有哪些?
【简答题】Why does Jack want to leave right away?
【单选题】In an emergency situation, for example in the event of damage to a fresh water cooler or generator, the sea water pump can be used to supply_____to the fresh water cooling system, merely by removing t...
A.
sea water
B.
fresh water
C.
cooling oil
D.
any of the above
【简答题】完形填空。 Most people do different things when they get l . This is certainly true for me. When I was in high school and college, my friends and I 2 _ to play a lot of sports. I played basketball and socc...
【单选题】利多卡因抗心律失常的作用机制是( )
A.
提高心肌自律性
B.
β受体阻断作用
C.
抑制Ka + 外流和Na + 内流
D.
促进Ka + 外流和Na + 内流
E.
改变病变区传导速度
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