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问题 单项选择题 配伍题

定量分析嗓音的方法是（）。

A.电视频闪喉镜

B.声图仪

C.声时

D.喉肌电图

E.电声门图

答案

参考答案：B

问答题 简答题

中央控制室操作工为什么必须学习现场操作？
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单项选择题

Mary invested $8,400 for 6 months in a certificate of deposit paying percent simple annual interest. How much more interest would Mary have received if the interest rate on this certificate had been 9 percent simple annual interest ？（）

A.$2.10

B.$21.00

C.$42.00

D.$210.00

E.$420.00
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