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【单选题】
下列实验中属于急性离体实验方法的是A.
刺激迷走神经离中端观察血压变化
B.
静脉注射生理盐水观察尿量变化
C.
观察吸入气中CO２增加时呼吸运动的变化
D.
利用坐骨神经标本观察刺激频率与收缩形式的关系
E.
记录膈神经放电
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】果蔬干制品干制过程中有哪些变化？
【单选题】His principal reason for making the journey was to visit his family.
A.
principle
B.
possible
C.
main
D.
initial
【单选题】Is this the reason ______he explained at the meeting for his carelessness in his work?
A.
that
B.
what
C.
how
D.
why
【单选题】Is this the reason ________ at the meeting for his carelessness in his work?
A.
explained
B.
what he explained
C.
how he explained
D.
why he explained
【单选题】地面按面层所用材料和施工方式不同具有不同的分类，水泥砂浆地面、细石泥凝土地面和现浇水磨石地面是属于（）。
A.
整体地面
B.
镶铺类地面
C.
粘贴类地面
D.
涂料类地面
【单选题】Is that the reason ________he explained to all at the meeting for his carelessness in his work? Actually we think he is a man who is hard ________ himself especially in work.
A.
that; on
B.
what; with
C.
why; at
D.
which; to
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