【单选题】
电源电动势E=6V,内阻R0=3Ω,当负载获得最大功率时,负载电阻R为()。
【单选题】
—Whatdopeopleheredoonweekends?—Well,somepeopleliketostayathome,but____liketogooutside.
【单选题】
-Wouldyouliketoordernow?-----_________________________
③
Yes.I’dlikefishandrice.
④
Thanks.Itisverykindofyou.
【单选题】
Whenshewasyoung,she___attenintheeveningandshesoon____.
【单选题】
_____fashiondiffersfromcountrytocountrymayreflecttheculturaldifferencesfromoneaspect.
【单选题】
English____inCanada
【单选题】
Mrs.Kinghasvisitedtheartmuseum.Iamgoingto____hersomewhereelsethisafternoon.
【单选题】
—Weneverknow_____theoldmanis.—Theysayheisateacher.
【单选题】
Theradiosays____acolddayinNorthChinatomorrow.