进路色灯信号机分为（）和发车进路色灯信号机两种。
参考答案：接车进路色灯信号机
正常肾血流约占心排血量的（）
A.5%
B.6%
C.10%
D.15%
E.20%
The Federal Government and the states governments are supposed to （）each other.
A.guide
B.control
C.keep independence from
