题目

She’s brought you some eggs. As you know, she ______chickens. A. keeps               B. will keep           C. has kept            D. kept 答案:A 【解析】  句意:她给你带了些鸡蛋。你知道,她养鸡。考查句子时态。A. keeps一般现在时; B. will keep一般将来时;C. has kept现在完成时; D. kept一般过去时。表达事实或真理,要使用一般现在时,结合句意可知填keeps;选A。7.欧姆定律的公式:I=$\frac{U}{R}$.
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