题目：
Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.
A.Gun tackle
B.Luff tackle
C.Two-fold tackle
D.Double-luff tackle
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
