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交流电动机必须有电别，其结构简单，价格低廉、结构坚固、寿命很长，而且控制理论的发展使其控制效果越来越接近直流电动机。（)

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Arecentpoweroutagedisruptedcustomeroperationsinoneofthetwocampuscenters.Thecustomerhasalreadystartedtodevelopastrategyforconsolidationofthedatacentersandremotebackupatacolocationfacility,butcurrentandnear-termbudgetsarefocusedonlyoncapacitygrowthatlowestcost.Whichofthefollowingcapabilitiesmightbeimmediatelyattractivetothecustomer？（）

A. DS8700withremotemirroring
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“ISO9000”不是指一个标准,而是一组标准的统称。（)

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Apreexistingdatabaseusermaybeusedbutanewdatabasehastobecreatedduringinstallation.
B. Apreexistingdatabasemaybeusedbutanewdatabaseuserhastobecreatedduringinstallation.
C. Apreexistingdatabaseandusermaybeusedoranewdatabaseanduserarecreatedduringinstallation.
D. Apreexistingdatabaseandusercannotbeused；anewdatabaseanduserarecreatedduringinstallation.

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浙江的观音泉是我国五大名泉之一。（)

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