举例说明：在什么情况下，管理员应该禁止用户更改帐户密码？
When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（） ["intake stroke","compression stroke","power stroke","exhaust stroke"]
工作设计中不需要考虑的因素是（）。 ["A.环境因素","B.行为因素","C.组织因素","D.选址因素"]
追踪法，是指观察者事先确定1～2个幼儿作为观察对象，观察他们在游戏中的活动情况。
Bulk cargo refers to（）. ["cargo which occupies a large volume of space","cargo which requires refrigeration","cargo which is very dense","homogeneous cargo not enclosed in a container"]
工作组有什么特点？
