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问题 单项选择题 A1/A2型题

下列不是磨耗的特征的是（）

A.面磨耗

B.邻面磨耗

C.牙尖磨平

D.前牙对刃

E.后牙接近AngelⅡ类关系

答案

参考答案：E

单项选择题

Justin Banks just won the lottery and is trying to decide between the annual cash flow payment option or the lump sum option. He can earn 8 percent at the bank and the annual cash flow option is $100000/year, beginning today for 15 years. What is the annual cash flow option worth to Banks today（）

A. $ 924423.70

B. $ 855947.87

C. $1500000.00
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单项选择题

下列不属于常用浸出方法的是

A．煎煮法
B．渗漉法
C．浸渍法
D．蒸馏法
E．醇提水沉淀法
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