存在于物料细胞中的水分是（） A.结合水 B.非结合水 C.平衡水 D.

阅读理解。

Dear boys and girls,

      I'm very happy to be your guest speaker today. It is a great pleasure to visit your school and meet all of

you here. I would like to tell you all by myself. I have been a reporter for the past fifteen years. I chose this

job so I could travel the world, but the job has taught me many unforgettable lessons. The work is sometimes

difficult. I have seen wars, earthquakes, poverty (贫穷) and death. But I have also seen courage, hope and

happiness.

     In India, I visited a city where there were many homeless children. Some were very young and lived in

the streets. But then a wonderful lady called Rosa opened a home for them. In a year, she was looking

after two hundred children, feeding them, teaching them and giving them hope.

     Another time, I was in Japan after a terrible earthquake. In a place, I found an old lady whose house

fell down. Her son was missing and people around her said that there was no chance that her son was alive.

But the lady did not give up hope. For four days, she kept moving heavy stones by herself. She did not stop

until she found her son. He was still alive.

      Here in China, I met a young boy with a serious illness. He had to have twenty operations in hospital.

But when I met him, he was still smiling. Now when my life is difficult, I always remember the courage

of the three people.

1. The writer chose the job as a reporter to _____. [ ]

A. meet homeless children

B. teach children some lessons

C. make a speech

D. travel the world

2. From the passage, we know Rosa was _____. [ ]

A. kind

B. young

C. hopeless

D. serious

3. _____ made the old lady in Japan find her son at last. [ ]

A. Happiness

B. Hope

C. Reporters

D. People around

4. When the writer is in trouble, she always thinks of _____. [ ]

A. boring travels

B. the courage of the three people

C. many homeless children

D. the terrible earthquakes and wars

5. The passage above is a _____.[ ]

A. news report

B. letter

C. speech

D. diary

把（    ）扩大到它的100倍是27.04。

将要删除的文字或对象高度亮化选中以后按什么键即可（）。

A、end

B、Backspace

C、Delete

D、Insert

浇注包盛铁水不得太满，最多不得超过容积的（），以免洒出伤人。

A．75％

B．80％

C．85％

下图是某家族性遗传病的系谱图（假设该病受一对遗传因子控制，A是显性、a是隐性），请回答下面的问题。

Ⅱ5和Ⅱ6生一个白化男孩的概率为（）