关于容量保护电路，说法正确的是
更新时间:2024-11-15 22:34:17 A、受管电压、管电流2个参量联合控制C
本题主要考查容量保护电路方面知识。容量保护电路是一次性预置保护，受管电压、管电流、曝光时间3参量联合控制，对多次累积性过载不起作用。
Whatarethekeyfeaturesofaresearchpaper?
Wehavetowaitforthebus,______?
Directions:TranslatethefollowingparagraphintoChinese.
Cyberspace,ofcourse.isbiggerthanatelephonecall.Itencompassesthemillionsofpersonalcomputersconnectedbymodems-viathetelephonesystem-tocommercialonlineservices,aswellasthemillionsmorewithhigh-speedlinkstolocalareanetworks,officeE-mailsystemsandtheInternet.Itincludestherapidlyexpandingwirelessservices:microwavetowersthatcarrygreatquantitiesofcellularphonesanddatatraffic;communicationssatellitesstrunglikebeadsinthegeosynchronousorbit;low-flyingsatellitesthatwillsooncrisscrosstheglobelikeangrybees,connectingfolkstoofar–flungortoomuchonthegotobetetheredbywires.Somedayevenourtelevisionsetsmaybepartofcyberspace,transformedintointeractive“teleputers-calledfull-servicenetworksliketheonesseveralcable-TV”bysocompanies(includingTimeWarner)arebuildingalongtheoldcablelines,usingfiberopticsandhigh-speedswitches.
ThethemeofThanksgivinghasalwaysbeen________.
Thedoctorsare________abouttheguidelinesunderwhichtheycancarryouteuthanasia.
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