不等式(k+3)x2-2(k+3)x+k-1<0对x的任意数值都成立.
(1)k=0
(2)k=-3E.
查看答案
某项目,在建设期初的建筑安装工程费为1000万元,设备工器具购置费为800万元,基本预备费200万元,项目建设期为2年,每年投资额相等,建设期内年平均价格上涨率为5%,则该项目建设期的涨价预备费为()万元。
A. 50.00
B. 90.00
C. 137.25
D. 184.50
根据文意,对“桥是不会动的”理解正确的一项是______。
A. 桥不会移动,处于完全静止的状态
B. 桥在有重车疾驰、巨浪冲击时是岿然不动的
C. 桥上无车无人,只有本身重量时,它不发生变形
D. 桥小动、微动不止,但人们察觉不出桥在空间上的变化
Woman: Our work in the language lab has been of great benefit to me. You know when I first
A. He is inexperienced, too.
B. He failed the language course himself.
C. He thinks the language lab is helpful.
D. The teacher has helped him to catch up.
Man: Jane, do you know what the faculty members are doing among pizza boxes and soda cans?
A. The faculty members are having a party.
B. The faculty members have no time to study economics and management.
C. The faculty members are very busy and have no time for the regular meal.
D. The faculty members are making time to do some physical exercises.