The new stadium being built for the next Asian Games will be________the present one.[ ]

A. as three times big as  

B. three times as big as

C. as big as three times  

D. as big three times as

根据《SDH本地网光缆传输工程验收规范》，子架与机架的加固应符合设备装配要求。接地线应与机架的接地端子（）

A.可靠连接

B.有效连接

C.紧密连接

D.固定连接