【单选题】【消耗次数：1】
23. English has become _____ international language of business.
①
the
②
. a
③
/
④
. one
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rapidly
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quickly
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greatly
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hardly
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came
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活荷载两跨满布时，各跨跨中正弯矩最大
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活荷载两跨满布时，各跨跨中负弯矩最大
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减小恒载，减小活载
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