题目内容

With respect to a decrease in the price of a normal good, the income effect:

A. and substitution effect both tend to increase consumption of the good
B. is to decrease consumption of the good, and the substitution effect is to increase consumption of the good
C. is to increase consumption of the good, and the substitution effect is to decrease consumption of the good

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A business believes a price discrimination strategy will increase both its output and profits. For this to occur, the firm must have:

A. customers who cannot resell the product and whose price elasticities of demand are in a limited range
B. distinct groups of customers with different price elasticities of demand who are able to resell the product
C. distinct groups of customers with different price elasticities of demand who cannot resell the product

内呼吸是指氧气从吸入()的空气中进入血液,进行血氧交换。

A. 上呼吸道
B. 肺泡
C. 肺管

成人人静态下的心率:60–100次/分,平均()。

A. 68次/min
B. 70次/min
C. 72次/min

现场急救时利用清晰明确的伤情标记,可以节省()的人力资源。

A. 急救人员
B. 医疗人员
C. 护理人员

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