高程控制网的测量方法有（ ）。
A．导线测量、三角测量
B．水准测量、电磁波测量
C．电磁波测量、三边测量
D．三边测量、水准测量
参考答案：B
Henry always forgets things he has done. Yesterday he forgot__________ and looked for it everywhere.
A．to post the letter
B．to have the letter posted
C．to have posted the letter
D．having posted the letter
膀胱、 * * 结石的排尿特点是
A．滴出尿液B．尿线变细C．尿射程变短D．尿线中断E．尿等待
