慢性咽炎的病理分型有_________、_________、_________及_________。
参考答案:慢性单纯性咽炎‖慢性肥厚性咽炎‖萎缩性咽炎‖干燥性咽炎
_____around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.
A.Having shown
B.To be shown
C.Having been shown
D.To show
干冰晶体是一种面心立方结构,如图所示,即每8个CO2构成立方体,且在6个面的中心各有1个,在每个CO2周围距离为a(其中a为立方体棱长)的CO2有( )。
A.4个
B.8个
C.12个
D.6个