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[单选] ()设全集U={a,b,C),集合M={a},P={a,b},则下列表示空集的是()
A.(<img src="//wximg.233.com/attached/image/20120915/20120915144216301630.gif" alt="" />UM)∩P B.M∩ P C.M∩(<img src="//wximg.233.com/attached/image/20120915/20120915144279297929.gif" alt="" />UP) D.(<img src="//wximg.233.com/attached/image/20120915/20120915144322112211.gif" alt="" />UM)∩(<img src="//wximg.233.com/attached/image/20120915/20120915144381458145.gif" alt="" />UP)
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