同一运输水平有（）台以上机车同时运行时，必须装备“信、集、闭”系统。
A.3
B.4
C.5
D.6
参考答案：C
All of the flowers now _____ here have developed from those once _____ in the forest.
A．raised; grown
B．rising; growing
C．raised; growing
D．rising; grown
下列除哪项外，均为禹白附的主治病证？（）
A.阴虚风动
B.中风喁斜
C.风痰壅盛
D.惊风癫痫
E.破伤风
