—Congratulations! You won the first prize in today’s speech contest.—().
A.Yes,I beat the others
B.No,no,I didn’t do it well
C.Thank you
D.It’s pleasure
A.Yes,I beat the others
B.No,no,I didn’t do it well
C.Thank you
D.It’s pleasure
第1题
Letter can express your ______.
A. congratulations
B. condolences
C. best wishes
D. all of the above
第2题
A.Look on the bright sid
B.Your company is very impressiv
C.Thank you very muc
D.I can’t agree mor
E.
第3题
设f(x,y)与φ(x,y)均为可微函数,且φˊ(x,y)≠0,已知(xo,yo)是f(x,y)在约束条件φ(x,y)=0下的一个极值点,下列选项正确的是().
A.若fˊx(x,yo)=0,则fˊy(xo,yo)=0
B.若fˊx(xo,yo)=0,则fˊy(xo,yo)≠0
C.若fˊx(xo,yo)≠0,则fˊy(xo,yo)=0
D.若fˊx(xo,yo)≠0,则fˊy(xo,yo)≠0
第4题
设f(x,y)与φ(x,y)均为可微函数,且φˊy(x,y)≠0,已知(xo,yo)是f(x,y)在约束条件φ(x,y)=0下的一个极值点,下列选项正确的是().
A.若fˊx(xo,yo)=0,则fˊy(xo,yo)=0
B.若fˊx(xo,yo)=0,则fˊy(xo,yo)≠0
C.若fˊx(xo,yo)≠0,则fˊy(xo,yo)=0
D.若fˊx(xo,yo)≠0,则fˊy(xo,yo)≠0
第5题
可微函数f(x,y在点(xo,yo)取得极大值,下列结论正确的是().
A.f(xo,y)在)y=yo处的导数等于零
B.f(xo,y)在y=yo处的导数大于零
C.f(xo,y)在y=yo处的导数小于零
D.f(xo,y)在y=yo处的导数不存在
第6题
A.No. I didn't do well enoug
B.Thanks.
C.Yes, I got a good mark
D.Who told you that?
第7题
You seldom go to the cinema on the weekends, ______ ?
A.don't you
B.will you
C.do you
D.did you
第8题
Speaker A: Hi John, I've got a very good job offer.
Speaker B: __________
A. Congratulations!
B. No wonder!
C. Are you trying to impress me?
D. You care too much about it.
第9题
第10题
Letter B
Dear Mary,
congratulations, promotion, pleasure, enthusiasm, position
It is our great(1)to inform you that you have been promoted to the challenging and demanding(2)of the manager of the Personnel Department.
This(3)is in recognition of the fine work you have clone for this firm.We are very confident that you will meet the new responsibilities which accompany the position of the manager of the Personnel Department with the same level of(4)and enterprise which you have exhibited since you came to work with our firm.
Please accept our(5)on your new promotion.
第11题
You seldom have to do the cooking,______?
A. have you
B. haven't you
C. do you
D. don't you