在严寒地区，空调建筑的外窗遮阳系数( )。
A．小于0.65 B．大于0.65 C．小于0.80 D．大于0.80
参考答案：C
— When will the 2010 World Expo (世博会) come to a close?
— It'll close at the end of _____. [ ]
A. September
B. October
C. November
D. December
临床常用的钙通道阻滞药对心血管系统的作用有哪些不同?
