________at his model plane over the weekend，he didn’t comp

【名词&注释】

选择性(selectivity)、肾小管(renal tubular)、重吸收(reabsorption)、肾小球(glomerular)

[单选题]________at his model plane over the weekend，he didn’t complete it．

A. As he worked hard
B. Hard as he worked
C. How he worked hard
D. How hard he worked

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学习资料：

[单选题]Not only the switches but also the old wiring ________ changed．

A. have
B. are
C. have been
D. has been

[多选题]尿液生成的基本过程包括（　　）

A. 肾小球^(glomerular)的滤过
B. 肾小囊对原尿的选择性重吸收
C. 肾小管和集合管的选择性重吸收
D. 肾小管和集合管的分泌
E. 排尿反射

[多选题]下列能排酸保碱，维持机体酸碱平衡的有（　　）

A. H+的分泌
B. K+的分泌
C. NH3的分泌
D. H+一Na+交换
E. H+一K+交换

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