小儿原发性肺结核原发病灶最常见的转归是（）
A.钙化
B.血行播散
C.产生空洞
D.干酪样变
E.支气管淋巴结周围炎
参考答案：A
一个圆的直径是另一个圆半径的2倍，则它们的面积之比是1：4．______．
The engineers are going through with their highway project, （） the expenses have risen.
A. even though
B. just because
C. now that
D. as though
