[单选题]设向量a,b满足:|a|=1,|b|=2,a与b的夹角是120°,则b与a+b的夹角是( )A.30°B.60°C.90°D.120°
[计算题]已知(1)求(2)求
[单选题]he university claims that a(n) _______international student requires $ 12,000 to cover the cost of livingin one academic year.[ ]A. singleB. onlyC. independentD. unique
[单选题]If you follow the doctors advice, youll look and feel much better ______. [ ]A. at no time B. at times C. in no time D. for a time
[单选题]Mr. and Mrs. Read are _____ in Beijing now.[ ]A. bothB. all C. either D. none
[单选题]Though he doesnt achieve his goals, he is not a failure.___, he is remembered as a true hero.?[ ]A. In particular B. On the contraryC. Generally speakingD. To be honest
[单选题]Any information one wants to know about Liaoning Province Shiyan High School North School, just call 024-89293117. It ___ be simpler.?A.mustntB.wontC.needntD.cant
[单选题]It doesnt seem ugly to me. ________,I think its rather beautiful. [ ]A. On the contrary B. In a wordC. On the other hand D. On one condition
[单选题]The girl wearing a pair of dark glasses comes from a city in South China, ______ is evident from her accent.A.whoB.thatC.whereD.as
[单选题]— Excuse me, is this seat _____— Yes, its available.( )A. vacant B. bare C. blank D. occupied
[单选题]We have friends ____, though we are a developing country. [ ]A. all the sameB. all the time C. all our lives D. all over the world
[单选题]— When did it begin to snow— It started _____ the night.[ ]A. during B. by C. in D. at
[单选题]Why do you insist on buying a car ______ you have such good public transportation here?A.becauseB.unlessC.whenD.though
[单选题]She has been ________ over his strange letter for several weeks, but she still figures out nothing about it.[ ]A.puzzlingB.worriedC.troubledD.anxious
[单选题]From his ______ look, I could see that he didnt believe what I said.A.amazingB.amazeC.amazedD.amazement
[单选题]If you are invited to any special occasion such as a wedding or a celebration, you’ll have to be ____ dressed.A.attractivelyB.appropriatelyC.conventionallyD.flexibly
[单选题]He looked at those jewels one after another ______and seemed to show no interest in any one of them.A.casuallyB.greedilyC.confidentiallyD.attentively
[单选题]The old man enjoyed the fresh air and admired the beautiful surroundings. ________, he lived a happy life.[ ]A. After allB. All in allC. In allD. Above all
[单选题]— How is everything going— It couldn’t be _______, for I lost my wallet this morning.A.worseB.badC.goodD.better
[单选题]—?Can you lend me the book Gone with the Wind— Sorry. I returned it to the library just now. Maybe it is still ____. [ ]A. availableB. affordableC. acceptableD. valuable
[单选题]It is really a challenging job to deal with people _____ various ages and backgrounds. ( )A. in B. at C. with D. of