The author thinks sleep is a funny thing as it is necessary for human life. [br]

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问题 The author thinks sleep is a funny thing as it is necessary for human life. [br] While awake, people can produce ______ waves in their brains.

选项

答案 alpha or beta

解析第3个小标题Sleep and the Brain部分的第1段第2、3句：A waking and relaxed person generates alpha waves，which are consistent vibrations at about 10 cycles per second．An alert person generates beta waves，which are about twice as fast．空白处需要waves的修饰成分。原文中的waking and relaxed和alert是awake的两个方面，故醒着时所产生的脑电波是alpha波或beta波。

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The author thinks sleep is a funny thing as it is necessary for human life. [br]

[originaltext]AccordingtoAlvinToffler,authorofthebestsellerFuture

[originaltext]AccordingtoAlvinToffler,authorofthebestsellerFuture

Theauthorofthereport___________________________(对医院的问题非常了解)becausehehas

Theauthor’sprimarypurposeinwritingthispassageisto______.[br]Whichof

Theauthor’sprimarypurposeinwritingthispassageisto______.[br]Accordin

Theword"demographic"(Line4,Para.1)means______.[br]Theauthorofthepa

Whatistheauthor’sattitudetowardstelevision?[br]Accordingtothetext,Am

Whatistheauthor’sattitudetowardstelevision?[br]Whichofthefollowingis

[audioFiles]audio_eusm_j01_029(20099)[/audioFiles]A、HethinksDavidisnotreli

Thepassageindicatesthatleadershipresearch______.[br]Theauthors’dictums

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大型建设工程项目总进度目标论证的核心工作是通过()。A、编制总进度纲要，论证

净制时，需分离不同的药用部位的药物是A:山茱萸B:麻黄C:栀子D:乌梅E

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