转向系统主要部件有（）
A.方向盘
B.转向管柱总成
C.转向万向节总成
D.轮胎
参考答案：A, B, C
Though ____a difficult and even dangerous place , Vietnam is now a friendly destination that welcomes visitors from all over the world _______.
A．considered; visiting
B．considered; to visit
C．considering ; visiting
D．considering; to visit
