【单选题】当营业杠杆和财务杠杆系数都为1.5时,联合杠杆系数为( )。
【单选题】第 10 题(本题:1分) 下列叙述中正确的是
A.
数据库系统可以解决数据冗余和数据独立性问题,而文件系统不能
B.
数据库系统能够管理各种类型的文件,而文件系统只能管理程序文件
C.
数据库系统可以管理庞大的数据量,而文件系统管理的数据量较少
【简答题】Symptoms included nausea, vertigo, headaches and ________ vision.
【单选题】Vertigo is an electronics company. According to the BCG matrix, which of the following products of Vertigo would most likely classify as a question mark?
A.
Blue–a cell phone that is designed for music lovers and has a very low market share in a market that is growing steadily
B.
Electra–a home entertainment system that has a strong market share in a market that is likely to expand in the future
C.
Jump–an MP3 player that has a high market share in a market that is not expected to grow significantly
D.
SpinDrive–a car audio system that has a high market share in a market that has been growing constantly
E.
SoLo–a CD player that has a very low market share in a market that is shrinking rapidly
【判断题】卢梭认为2-12岁的教育,以知识教育和劳动教育为主。()