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Vcuum clenersnd electric broomsrelmosts bsic todys once were the ordinry brVcuum clenersnd
electric broomsrelmosts bsic todys once were the ordinry broomnd dustpn. With or without their specilttchments, these cleners cn hndle hrdwood floors, wils, crpets, furniture,nd drperies,ndren importnt fctor in the mintennce ofpplinces suchs windowir conditionersnd refrigertors.lthough vcuum clenersrevilble in vriety of sizesnd shpes （） Dust will be pulled into the motor, where itThe whirring of the fn does not necessrily occurt high speed. B． vcuum is creteds the fn sucksir into the inner comprtment. C．s vcuum clener works, mgnetic field is creted, drwing dust, dirtnd other prticles into the mchine. D．There is filter in vcuum clener, whose sole function is to permitir to flow through.A．The whirring of the fan does not necessarily occur at a high speeDB．A vacuum is created as the fan sucks air into the inner compartment．C．As a vacuum cleaner works, a magnetic field is created,drawing dust, dirt and other particles into the machineD．There is a filter in a vacuum cleaner, whose sole function is to permit air to flow through．
某青年男性患者因股骨頸骨折空心螺釘內(nèi)固定術(shù)后合并股骨頭壞死，現(xiàn)有輕微不適，X線檢查顯示股骨頭某青年男性患者因股骨頸骨折空心螺釘內(nèi)固定術(shù)后合并股骨頭壞死，現(xiàn)有輕微不適，X線檢查顯示股骨頭外形正常，3枚空心螺釘未見(jiàn)明顯異常，MRI顯示壞死病灶范圍占股骨頭面積小于1/3，區(qū)域于股骨頭內(nèi)側(cè)柱，目前首選治療方法是（）
A.中醫(yī)辨證施治
B.人工關(guān)節(jié)置換手術(shù)
C.拆除空心螺釘
D.帶血管骨瓣移植術(shù)
E.以上都不是