There is even an animal whose tail will _____ so that it can run away if someone grabs itA.break downB.break upC.break outD.break off
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D解析短语辨析。break down 毁掉,发生故障;break up 打碎,结束; break out 爆发;break off折断,突然停止。句意:有一种动物,他的尾巴会突然折断,如果有人抓住它的尾巴,它会因此而逃掉。故选D。