单项选择题
1、




2、下列事实能引起不当得利之债的是（　　）
A．养子女给付生父母赡养费用
B．明知不欠他人欠款而为给付
C．提前偿还所欠他人债务
D．为履行合同而支付对方金钱，后该合同被确认为无效

3、__________was reported yesterday, two buildings were caught on fire in the town.
A. It 
B. As 
C. What 
D. That

4、Paula: Hello, my name is Paula Field. Welcome you to Tectron UK.
Jens: Thank you. _________.
A．Nice to meet you 
B．It was kind of you
C．You've got a nice name 
D．Nice meeting you

5、Speaker A: Can you tell me the way to the library?
Speaker B: Sure. Turn left at the next crossing.
Speaker A: Is it on King Street?
Speaker B:_________.
A．That's all right 
B．Ye You can't miss it
C．It's obvious 
D．O Just do it

填空题
6、 能力的形成与知识的掌握同步。



7、 已知，且在[a，b]上连续，则由曲线，直线z=a，z=b及z轴所围成图形的面积S=__________

8、隔江犹唱后庭花
后庭花：

简答题
9、 简述营养级之内的能量转化效率的种类。


10、

论新民主主义革命的三大法宝及其相互关系。

责编：cxy  评论 纠错