[单选题]已知|a|=1,|b|=6,a·(b-a)=2,则向量a与向量b的夹角是A.B.C.D.
[单选题]With so much _____ equipment, wood and paper in one place, there is a danger of fire. [ ]A. electric B. electronic C. electricalD. electricity
[单选题]He was a good student and scored _____ average in most subjects. [ ]A. below B. of C. on D. above
[单选题]Having retired from work, he is ?with the welfare(福利) of the disabled.AassociatedB.occupiedC.armedD.abandoned
[单选题]Her attitude to the party is __________ She said she liked it but she refused to attend it. [ ]A. controversialB. contradictory C. contemporary D. conventional
[单选题]Besides our group, we need some 20 extra workers _____ to get the work finished in time. [ ]A. aroundB. about C. or soD. X
[单选题]Though measures have now been taken to prevent further price hikes, many people remain _______ over the rising cost of food. A.be concerningB.concernsC.concernD.concerned
[单选题]We are living a_____ life in the country. ( )A. still B. quiet C. calm D. silent
[单选题]— How long do you think itll be _____ I can go back to work — Well, youll be feeling much better by next weekend. [ ]A. beforeB. when C. until D. that
[单选题]若两个非零向量,满足|+|=|-|=2||,则向量+与-的夹角为( )A.—6B.—4C.2丌3D.5丌6
[单选题]None of them have regular and ________source of income and they are forced to live below poverty line.[ ]A. safeB. legalC. secureD. diverse
[单选题]He is very ______ and well-qualified, so he should reach the top of his profession.A.proudB.jealousC.ambitiousD.enthusiastic
[单选题]Shirley,a real book lover,often brings home many books to read____the library.[ ]A. inB. forC. byD. from
[单选题]在△A.C中,P是BC边中点,角A、B、C的对边分别是a、b、c,若cAC +aPA+b PB=,则△ABC的形状为[ ]A.直角三角形B.钝角三角形C.等边三角形D.等腰三角形但不是等边三角形
[单选题]—You look tired, Jack. Whats wrong with you—Oh, 1 worked quite late last night. Nothing wrong with me,.A.although B.thoughC.yetD.still
[单选题]—Mary, let’s go to the bookshop this weekend. Will you be ______ —Sorry, but I’m going to visit my uncle in the countryside.A.vacantB.suitableC.convenientD.available
[单选题]Never lose much time _____ you should make use. [ ]A. that B. which C. of which D. of that
[单选题]Believe it or not, that is _____ people call the sixth sense.A.whenB.whatC.whyD.which
[单选题]From his _____ voice on the phone, I know everything is going under way. ( )A. satisfactoryB. satisfyingC. satisfiedD. satisfaction
[单选题]“_____ the election is over,” said Powell, “the time has come for me to step down as secretary of state and return to private life.”[ ]A. Now thatB. In caseC. So long asD. As far as
[单选题]_______work has been done to improve peoples livingstandards.[ ]A.? ManyB.? A great many C. A great deal of D. A large number of