试题与答案

主要用于预防支气管哮喘的药物是A.氨茶碱 B.肾上腺素 C.特布他林 D.色甘酸钠

题型:单项选择题

题目:

主要用于预防支气管哮喘的药物是

A.氨茶碱

B.肾上腺素

C.特布他林

D.色甘酸钠

E.异丙肾上腺素

答案:

参考答案:D

解析:色甘酸钠为一种非糖皮质激素抗炎药物,可预防哮喘的发作,而其余四种药物均为平喘药物,用于哮喘发作时的治疗。

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题型:单项选择题

Are the following two statements about the marginal revenue product (MRP) of a factor of production correct Statement 1: In a price taker market, the MRP of an input is the marginal product of the input multiplied by the price of the output it generates. Statement 2: If we compare any two productive inputs, the one with the higher MRP will earn greater economic rent.Statement 1Statement 2()①A. Correct Correct ②B. Incorrect Correct ③C. Correct Incorrect

A. ①

B. ②

C. ③

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