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患儿，女，5岁，半年前发现患儿双耳听力进行性下降，无耳痛，无耳溢液史，不伴眩晕耳鸣。

下列哪些措施有助于诊断（）

A.ABR

B.声导抗

C.DPOAE

D.CT

E.双耳交替响度平衡试验

F.冷热试验

答案

参考答案：A, B, C, D, E

单项选择题

A．p-＞next

B．p

C．s

D．s-＞next
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单项选择题

MIDI enables people to use (51) computers and electronic musical instruments. There are actually three components to MIDI, the communications " (52) ", the Hardware Interface and a distribution (53) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (54) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (55) are stored in MIDI files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.

（55）是（）

A.messages

B.packets

C.frame

D.information
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