John is the boy _____legs were badly hur

阅读理解。

      Whenever the sun dropped and the blue sky came up, my father and I used to climb the mountain near

my house. Walking together, my father and I used to have a lot of conversations through which I learned

lessons from his experiences. He always told me, "You should have goals like climbing the mountain." Without

the mountain-climbing that we both enjoyed,we couldn't have enough time to spend together because my

father was very busy. I really got a lot from mountain-climbing. It gave me time to talk with my father and

to be in deep thought as well as develop my patience (耐力).

      Once we climbed a very high mountain. It was so challenging for me because I was only ten years old.

During the first few hours of climbing. I enjoyed the flowers and trees, and the birds' singing, but as time

passed, I got a pain in both of my legs. I wanted to quit climbing. In fact, I hated it at that mountain, but my

father said to me, "You can always see a beautiful sky at the top of the mountain, but you can't see it before

you reach the top. Only there at the top, can you see all of the nice things, just like in life."

      At that time, I was too young to understand his words. But later after that, I got new hope and confidence.

I found myself standing at the top of the sky, which was as clear as crystal (水晶).

1. The passage tells us that mountain-climbing was _____ for Father and Son.[ ]

A. hard

B. enjoyable

C. painful

D. comfortable

2. The word "quit" in the passage means "_____". [ ]

A. carry on

B. put off

C. give up

D. pick up

3. Which of the following is the closest (最接近的) in meaning to the father's words in the second paragraph? [ ]

A. You will get all you need at the top of the mountain.

B. The sky is always as clear as crystal.

C. You can find life is full of nice things.

D. Never give up half-way.

4. We can infer (推断) from the last paragraph that _____. [ ]

A. the writer was very successful in his life.

B. the writer reached the top of the mountain.

C. thought the writer was young, he could understand his father.

D. the writer used to stop half-way when he climbed the mountain.

5. The best title (题目) for the passage is "_____". [ ]

A. Reaching the Top of the Mountain

B. Standing at the Top of the Mountain

C. Conversations between Father and Son

D. How to Get to the Top of the Mountain

2009-2012年间一次能源生产量增速最快的一年是?

A.2009年 

B.2010年 

C.2011年 

D.2012年

如图所示, 木板静止于水平地面上, 在其最右端放一可视为质点的木块. 已知木块的质量m＝1 kg, 木板的质量M＝4 kg, 长L＝2.5 m, 上表面光滑, 下表面与地面之间的动摩擦因数μ＝0.2.现用水平恒力F＝20 N拉木板, g取10 m/s², 求:

（1）要使木块能滑离木板, 水平恒力F作用的最短时间;

（2）如果其他条件不变, 假设木板的上表面也粗糙, 其上表面与木块之间的动摩擦因数为μ₁＝0.3, 欲使木板能从木块的下方抽出, 需对木板施加的最小水平拉力；

挂线疗法应用于高位肛瘘的主要优点是：

A．没有疼痛
B．不会造成肛门失禁
C．疗程短
D．引流好
E．简便

缺铁性贫血治疗最重要的是

A．补充铁剂

B．病因治疗

C．脾切除

D．少量输血

E．肌肉注射维生素b12