队列队形练习中的口令一般由预令和动令组成。预令是(),动令是()。
参考答案:指明动作的性质;动作开始的命令
Last year Jackie saved 5% of her annual salary. This year, she made 10% more money than last year, and she saved 8% of her salary. The amount saved this year was what percent of the amount she saved last year ?()
A. 56%
B. 76%
C. 158%
D. 176%
E. 188%
当将局部E-R图集成为全局E-R图时,如果同一对象在一个局部E-R图中作为实体,而在另一个局部E-R图中作为属性,这种现象称为 【13】 冲突。