一般位置平面的三个投影均为平面图形，且面积都比平面的实际面积小。
A. 对
B. 错
U2L1-12) What will Urbanization cause accoding to the discussion?
A. it will promote modernization.
B. Many poor people will appear in the city.
U2L1-13) Why is urbanization considered unprecedented?
A. Because of the number of people involved.
Because of its profound effects on the world.
大学的原本意思是：
A. 高等学校
B. 规模大的学校
C. 大人之学
D. 精英之学
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