矿井通风网络中，井巷联接的基本形式有（）。

A、串联网路

B、并联网络

C、角联网络

D、复杂联接形式

E、其他

In 1776 the United States announced the Declaration of Independence to ______ from the British Empire and became an independent country.
A. pull down B. break away C. get off D. drop off