（）是施工劳动力的类型之一。

Once there was a baby eagle living in a nest (巢) on a cliff (山崖). 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 the 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 mother appeared 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, “Mum, why did you do this to me? I’m hungry. Don’t you know I will die if 1 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 eagle out of the nest.

The baby eagle fell down, faster and faster. He looked up at his mum, “ 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.

(    )6. 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 the tree.     B. His mother offered him nice food.

C. He was always cold and hungry.      D. He lived very happily with friends.

(    )7. How did the baby eagle feel as soon as he saw his mother coming again?

A. Sad.              B. Happy.           C. Afraid.           D. Angry.

(    )8. 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 he baby eagle and flew away.

D. She pushed her baby eagle out of the nest.

(    )9. What does the word “abandon” mean?

A. 抛弃              B.保护             C.歧视            D. 拯救

(    )10. We can infer (推断) from the story that _____________.

A. The baby eagle lost his mother     

B. The baby eagle fell down and died

C. The baby eagle could get food himself

D. The baby eagle was still angry with his mother

正常脊柱的描述正确的是（）.

A.颈椎后凸

B.胸椎前凸

C.腰椎后凸

D.骶椎前凸

E.腰椎受力最大

在用光具座研究凸透镜成像规律的实验中

（1）测量凸透镜的焦距如图所示，则该凸透镜的焦距为______．

（2）将蜡烛、凸透镜、光屏依次放在光具座上，点燃蜡烛后，左右移动光屏，发现光屏上所成的像如图所示，你认为造成这种现象的原因是______．

（3）下表是某同学实验时记录数据一部分，比较①③组数据可得出的规律是______；比较②④组数据可得出的规律是______．

驾驶机动车在公交车站遇到这种情况要迅速停车让行（行人将要横穿马路）。

简述对圆锥孔滚动轴承的装配。