28我国建立以社会主义公有制为主体的多种所有制结构,是由于()

　建立市场经济体制的需要

　吸引外资的需要

　生产力发展多层次、不平衡的要求

　社会化大生产发展的要求

正确答案：C

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9. When he was in his ( ), he got the chance to go abroad to study.

8. What date is it ? It’s ( ).

7. Eight minus three ( ) five.

6. “Did you buy anything at the clothing sale?” “Yes, I bought three ( ) ties for just twelve dollars.”

5. “What did the professor tell you to do?” “I had to write a ( ) report. ”

4. "How many presidents were there before Abraham Lincoln?""Fifteen, so he was ( )."

3. The Great Wall of China is about 6,700 ( ).

2. The meeting will be held in ( ) .

1. In ( ) century computers will be used more widely.

43. It was ( ) he got a map that he started on his away.