隧道按面积分为小断面、中等断面、大断面和特大断面隧道,其中,大断面的面积范围是()。
A.30
B.50
C.100
D.150
参考答案:B
One day Chuck is on a flight () the Pacific Ocean suddenly () his plane crashed.
A. through while
B. through when
C. across when
D. across while
牛仔服后整理最基本的方法是(),如普洗、石洗/石磨、砂洗、破坏洗等。