起落架应急收放系统旁通活门的功用是什么?
A、旁通液压B系统
B、旁通A系统，连接B系统
C、旁通A系统
D、以上均错误
参考答案：B
Ten years ago the population of our village was ____ that of theirs. [ ]
A. as twice large as
B. twice as large as
C.twice as much as
D. as twice much as
简述博尔赫斯的创作特征。
