（）对Na+的重吸收占原尿Na+量的60%~65%。
A. 近曲小管
B. 髓袢升枝
C. 远曲小管
D. 集合管
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使用（ ）进行利尿时，无需补钾，因为其有保钾作用。
A. 呋塞米
B. 氢氯噻嗪
C. 螺内酯
D. 甘露醇
氯化铵内服不具有的作用是（）
A. 稀释痰液
B. 利尿
C. 酸化尿液
D. 镇咳
Which of the following can be described as involving direct finance?______________
A corporation’s stocks are traded in an over-the-counter market
B. A corporation buys commercial paper issued by another corporation
C. A pension fund manager buys commercial paper from the issuing corporation
D. Both A and B of the above
A corporation acquires new funds only when its securities are sold in the _________________.
A. secondary market by an investment bank
B. primary market by an investment bank
C. secondary market by a stock exchange broker
D. secondary market by a commercial bank
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