问题 选择题
设f(x)是定义在R上的奇函数,当x≥0时,f(x)=2x-lg(x+1)+a(a为常数),则f(-1)=(  )
A.lg2-2-aB.2+a-lg2C.lg2-1D.1-lg2
答案

答案:C

完形填空

It is a good idea to  1 a small present when you go to a  2 party in England or the USA. Flowers are always nice or you may bring a bottle of wine  3 you know what the family  4  . You should arrive on time or  5 minutes late. Don't get there early. If you are going to be there  6 fifteen minutes late, you should call and tell the host and hostess. Try to relax at the dinner table. If you don't know  7 to use the fork(叉子), the knife, or the spoon, just watch  8 and follow them. You can also ask someone next to you. If you like the food, say so. Of course, you will thank the host and the hostess  9 the meal and for their kindness. It's good to send a card or a “thank you” note the   10 day.

小题1:A. bring               B. take                 C. carry

小题2:A. breakfast           B. lunch                C. birthday

小题3:A. when                B. if                   C. so

小题4:A. eat                 B. drinks               C. drink

小题5:A. five                B. ten                  C. five to ten

小题6:A. less than           B. more than            C. about

小题7:A. why                 B. how                  C. what

小题8:A. other               B. the others           C. others

小题9:A. for                 B. of                   C. at

小题10:A. later              B. tomorrow             C. next

判断题