【单选题】【消耗次数：1】
气体在离心式压缩机扩压器中压力将（ ）。
①
降低
②
升高
③
压力不变
④
速度升高，压力降低
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What does the functional view of language see language?
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A system of categories based on the communicative needs of the learner
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A linguistic system made up of various subsystems
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Teaching attitude
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experiences
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下列关于专家型教师教学特点的表述，错误的是( )。
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与新教师相比，专家教师的课时计划简洁灵活，以学生为中心，并具有预见性
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