单句改错。

1. Zhongguancun made possible for him to follow his dreams and help the country he loves. _________.

2. A number of overseas Chinese has grasped the opportunity to develop their ideas at home. _________.

3. He used for the latest ideas and technical inventions of his day in his books. _________.

4. Walk along its shores they go through forests of mushrooms and plants that lived on the earth long ago.

     _________.

5. It was on a night in November when I looked at the result of my work. __________

6. The water in the ocean also keeps the temperature of the earth steadily by absorbing and releasing heat.

     _________

7. Heat capacity is the amount of energy that takes to raise the temperature of a substance one degree 

    centigrade. __________

8. At that time black people had no rights to voting in the southern states of America. _________

9. Housing condition for blacks were bad and there were little jobs to employ blacks. _________

10. There were already people wondering whether to fight for the rights of robots and machines. _________

对厂房一般照明的光窗设置要求中，车间通道照明灯应覆盖所有通道，覆盖长度应大于( )的车间安全通道长度。

A．60%

B．70%

C．80%

D．90%