The anti-virus agent was not known______(直到一名医生偶然发现了它).

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问题 The anti-virus agent was not known______(直到一名医生偶然发现了它).

选项

答案until a doctor discovered it by chance

解析

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本试题收录于：英语题库普高专升本分类

英语

普高专升本

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The anti-virus agent was not known______(直到一名医生偶然发现了它).

英语

普高专升本

Employmentbecamewidespreadwhentheenclosuresofthe17thand18thcenturiesbegan.Itmademanypeopledependentonpaidjob

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A:Hello,UncleJohn!B:Hello,Bob!【D1】Youlookworriedandupset.A:【D2】Ireallyneedyourhelp.B:Whatdoyo

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题33图所示为一直流斩波器，VT为开关元件，采用PWM调制。已知Us＝120V，导通时间为0．5ms，关断时间为0．5ms。(1)求斩波器的周期T，占空比D；(2)求斩波器的平均电压Ud。

WhileIwaswaitingtoenteruniversity,IsawadvertisedinalocalnewspaperateachingpostataschoolinasuburbofLondon

关于利尿剂治疗心衰的原则，错误的是

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CommercialVicesThecommercialvicesaregambling,prostitution,anddrugs.Theappealsofthecommercialvicesaresostron

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A:Hello,UncleJohn!B:Hello,Bob!【D1】Youlookworriedandupset.A:【D2】Ireallyneedyourhelp.B:Whatdoyo