题目

在下列简单的机械中,属于省距离的是        A.羊角锤         B.镊子      C.定滑轮    D.动滑轮 答案:BThe songs _____ she sang in the concert yesterday sounded _____.   A. / ; beautifully   B. that ; wonderfully   C. which ; well   D. / ; nice
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