【单选题】【消耗次数:1】
6. The company ____ that their product “makes you thin without dieting”.
claims
demands
collects
allows
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相关题目
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①  正确
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【单选题】 单相桥式整流电路输出电压平均值为30V,负载电阻<imgwidth="66"height="24"v:shapes="_x0000_i2244"src="http://wljy.whut.edu.cn:80/uploadfiles/word/mndzjs.files/image032.png">,则流过每个二极管的平均电流为(   )。
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