【单选题】下面关于项目的说法哪一项是正确的?Which of the following is true of projects?下
A.
项目都具有模糊的开始和结束。They have an indefinite beginning and end.
B.
项目都有一个特定的目的。They have a unique purpose.
C.
项目采用回归阐述方法开发。They are developed using regressive elaboration.
D.
项目都是永久进行下去的。They are permanent in nature.
【单选题】我国宪法是国家各项制度和法律规范的总依据,这表明( )
C.
一切法律、行政法规、地方性法规的制定都必须以宪法为依据,遵循法律的基本原则,不得与宪法相抵触
【单选题】______ is an idiom, which means to make appeals in vain.
【单选题】在旅行社促销的巩固期,( )是进一步促销成功的关键。