【单选题】As for an office lady, which may be the most important factor when she pick a computer?
【多选题】本课程推荐阅读的书籍有哪些?
A.
David Besanko, David Dranove, and Mark Shanley. Economics of Strategy. John Wiley & Sons, Inc. 1996 戴维·贝赞可(等):《公司战略经济学》,北京大学出版社
E.
钱·金:《蓝海战略:超越产业竞争 开创全新市场》,商务印书馆
【单选题】Which of the following may be a density-independent factor that affects animal population?
C.
The number of predators.
D.
The variety of food supply.
【单选题】Which factor is mentioned in paragraph 2?
A.
Too much sleep may increase one's weight.
B.
Lack of sleep may be one of the reasons causing the overweight problem.
C.
9 hours of sleep is perfect for people to stay slim.
D.
Less than 7 hours of sleep will increase the danger of gaining extra pounds.
【多选题】下列选项中,关于混凝土运输的说法正确的是( )。
A.
混凝土运输过程中不产生分层、离析现象,保持混凝土的均匀性
B.
保证设计所规定的流动性,应使混凝土在初凝前浇筑并振捣完毕
C.
运输工作应保证混凝土浇筑工作可以间断进行,以最少的转运次数,最短的时间运至浇筑地点
D.
混凝土在运输过程中要求道路平坦,运输线路尽量短而且直
【单选题】Cage-type induction motors have a very poor power factor which may be as low as 0.3-0.4 when ____.