信号微机监测系统采集站内电码化电流采用（）电流模块。
A、1X
B、4X
C、3X
D、2X
参考答案：D
The new story is written in________easy English________even beginners can understand it. [ ]
A. such; that
B. so; that
C. such; as
D. too; that
恒牙骨化开始的年龄是
A．新生儿
B．1岁
C．2岁
D．3岁
E．4岁
