－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

1_____education is the instruction that occurs when the instructor and students are separated by distance or time,or both

If a boy or a girl has grown up in a home with sharing tasks and decisions，he or she will probably______.

根据文献的发布类型和载体形式划分，文献可以分为哪些类型？常用特种文献种类有哪些？

历史文献学包含有版本学、校勘学、（）辨伪学等。

文献分析有两大类，即文献（）和文献（）。

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．

激素按其化学性质可分为 _______和_______两大类。

电机从供电方式分类可以分为 ___ 和___ 两大类。

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