梯形螺纹测量一般是用三针测量法测量螺纹的______。

水准测量的测站校核，一般用______法或______法。

学校教育心理学的主要研究方法有__________、__________、教育经验总结法、自然实验法、实验室实验法和__________。

Either he or I ______to the airport.

在碎部测量中采用视距测量法，不论视线水平或倾斜，视距是从________到________的距离。

学校教育心理学的主要研究方法有__________、__________、教育经验总结法、自然实验法、实验室实验法和__________。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Duty is an act or a course of action that people ______you to take by social customs, law or religion.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

Hurry up, or you ______ catch the train.

对高程测量，用水平面代替水准面的限度是________。