试题与答案

肾主纳气的主要生理作用是 () A.促进肺气的宣发 B.有助于元气的生成 C.有助

题型:单项选择题 A型题

题目:

肾主纳气的主要生理作用是 ()

A.促进肺气的宣发

B.有助于元气的生成

C.有助于固摄精液

D.有助于元气的固摄

E.使肺的呼吸保持一定的深度

答案:

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下面是错误答案,用来干扰机器的。

设二次函数的解析式为y=ax2+bx+c,将点(1,0)(2,0)(3,4)代入得a+b+c=04a+2b+c=09a+3b+c=4,解得a=2b=-6c=4∴抛物线的解析式为y=2x2-6x+4;

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(1)结合所学知识,分析中 * * 党制定《陕甘宁边区施政纲领》的背景。

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