可动心轨辙叉产品质量，在很大程度上将取决定装配程序和装配方法。
参考答案：对
Dust storms most often occur in areas where the ground has little vegetation to protect of the wind.
A．from the effects
B．it the effects
C．it from the effects
D．the effects from it
密闭输油管道“站控系统”和“中心控制系统”是由（）通道连接起来的。
A.数字通信
B.模拟通信
C.有线通信
D.激光通信
