2．函数的图象和函数的图象的交点个数是　．

1．若函数的定义域为R，则实数a的取值范围是　　　　．

35.　 -I’m afraid I can’t memorize so many new words in 2 days．

-_______．

A．Don’t be afraid　 B．You are clever　　 C．Not at all　　 D．Take your time

34. Failure is never pleasurable, but it can make a positive contribution to your life_____ you learn to use it.

　 A. since　 B. once　 C. until　　 D. unless