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问题 单项选择题

痫证治疗主穴是（）。

A．百会　人中　后溪　涌泉

B．哑门　天突　光明　睛明

C．人中　风府　鸠尾　腰奇　丰隆

D．人中　内关　神门　丰隆　涌泉

E．人中　丰隆　神门　心俞　肝俞

答案

参考答案：C

填空题

氧枪由三层钢管构成，其中外层管与中间管之间是冷却水的（）通道。
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单项选择题

A merchant paid $300 for a shipment of x identical calculators. The merchant used 2 of the calculators as demonstrators and sold each of the others for $5 more than the average (arithmetic mean) cost of the X calculators. If the total revenue from the sale of the calculators was $120 more than the cost of the shipment, how many calculators were in the shipment ？（）

A．24

B．25

C．26

D．28

E．30
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