内燃机按汽缸布置形式分类有（）等。
A.卧式
B.V型
C.立式
D.直列式
参考答案：A, B, C, D
To our delight, these peasants first ______ of poverty are not only widening their roads to wealth, but
doing what they can to help others in need.[ ]
A. to rid
B. rid
C. ridding
D. having rid
支气管扩张多发生在哪一级支气管（）。
A.一级
B.二级
C.三级
D.四级
E.五级
