在建筑物放线中，延长轴线的方法主要有两种：（）和轴线控制桩法。
A．平移法
B．交桩法
C．龙门板法
D．顶管法
参考答案：C
It was foolish of him to ______ his notes during that important test，and as a result，he got punished.
A．stick to
B．refer to
C．keep to
D．point to
光电式传感器可用来测量转速，但霍尔传感器不能实现转速测量。
