已知f(x)=ax-1x，g（x）=lnx，（x＞0，a∈R是常数）．（1）求曲
题型：解答题
问题：
已知f(x)=ax-
（1）求曲线y=g（x）在点P（1，g（1））处的切线l． （2）是否存在常数a，使l也是曲线y=f（x）的一条切线．若存在，求a的值；若不存在，简要说明理由． （3）设F（x）=f（x）-g（x），讨论函数F（x）的单调性． |
题型：解答题
Eagles are members of the bird family. More than 60 kinds live in Africa. Once there was a baby eagle living in a nest on a cliff(悬崖). The baby eagle loved his nest. It was warm, soft and comfortable. And even better, he had all the food and love that his mother could give. Whenever the baby eagle was hungry, his mother would always come just in time with delicious food he liked.
He was growing happily day after day. But suddenly his world changed. His mother stopped coming to the nest. He was full of sadness and fear. He thought he would die soon. He cried, but nobody heard him.
Two days later his mother came with some nice food. The baby eagle was wild with joy. But his mother put the food at the top of the mountain and then looked down at her baby. The baby eagle cried out, “Mom, why did you do this to me? I’m hungry. Don’t you know I will die if I have nothing to eat?”
“Here is the last meal I give you. Come and get it by yourself.” his mother said. Then she flew down and pushed the baby out of the nest.
The baby eagle fell down, faster and faster. He looked up at his mom, “Why do you abandon me?” He looked down at the earth. The ground was much closer. Then something strange happened. The air caught behind his arms and he began to fly! He wasn’t moving to the ground any more. Instead, his eyes were pointed up at the sun. “You are flying! You can make it!” His mother smiled.
小题1:Which of the following is true about the baby eagle’s life before his mother stopped coming to the nest?
A．He lived in a nest in a tree.
B．His mother gave him nice food.
C．He was always cold and hungry.
D．He lived very happily with his friends.小题2:How did the eagle feel as soon as he saw his mother coming again?
A．Sad.
B．Happy.
C．Afraid.
D．Angry.小题3:What did the baby eagle’s mother do when she came the last time?
A．She put some food in the nest.
B．She just came to see him again.
C．She shouted at her baby eagle and flew away.
D．She pushed her baby eagle out of the nest..小题4:The underlined word “abandon” means _________ in Chinese.
A．抛弃
B．保护
C．歧视
D．拯救小题5:We can infer from the story that the baby eagle ___________.
A．lost his mother
B．fell down and died
C．could get food himself
D．was still angry with his mother