《高速铁路接触网运行维修规则》中规定：接触网悬挂状态检测监测装置（4C）周期是（）个月。
A.3
B.4
C.5
D.6
参考答案：A
Small private companies can' t _____with big national companies, so they must try their best
to win part of the market.
[ ]
A. deal
B. compete
C. work
D. share
我国银监会规定，我国商业银行的不良资产率不能大于( )。
A．8%
B．5%
C．4%
D．12%
