某房地产开发公司拟在某城市近郊区开发建造一居住区，根据居住区规划设计规范的要求进行具体规划设计。居住区用地的中高层住宅比例为40%、总建筑密度为50%、住宅建筑净密度为80%；该用地现已成为市政公用设施齐全，布局完整，环境较好，以多、中、高层住宅为主的用地。
该居住区的绿地率不应低于( )。
A．20%
B．30%
C．40%
D．50%
参考答案：B
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| Once my father and I went to see a circus (马戏团). A family was standing in front of us 1 for tickets. The family had eight children. Their clothes were not 2 but they were clean. They were talking about the clowns (小丑) and elephants excitedly. "I want 3 tickets, eight for children and two for adults (成人)." said the father to the ticket lady. The ticket lady told him the 4 . When he heard that, the man couldn't believe his 5 . He asked again, "How much?" The ticket lady spoke again. The father looked sad. Clearly, he didn't have 6 money. My dad took a $20 bill and dropped it on the ground. Then he 7 the bill, and said to the man, "Sir, this fell out of your pocket." The man knew what was 8 on. He looked into my dad's eyes and took the 9 ."Thank you, thank you, sir. This 10 means a lot to me and my family." We didn't go to the circus that night, but we didn't feel sorry for it at all. | ||||
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