采购人、采购代理机构应妥善保存政府采购文件，保存期限为从采购结束之日起至少_____

阅读下面的短文，然后按照要求写一篇I5。词左右的英语短文

Chinese students will start their rwo-mnnth summer vacation. But Chinese parents have already decided how their children will spend the summer

Generally speaking, there are basically two ways for Chinese students to pass their sum- met vacation: one, relax at home or go to join some summer camps; two., sign up for classes, such as Olympic math, English, and musical instruments. A few lucky children do get to..en- joy the whole summer without spending time in a classroom. Yuan Weiwei, for example, has made a point of not enrolling her twelve-yesrold son, Li Zhuoqi, in any summer lessons.

`This summer vacation is just for fun,”she said. " I think most parents feel they In to prepare their children so early. I don't blame them but I think the best thing is to find as much non-working time for the children as possible.＂However, Zhu Baocheng, 14 years old, isn't so lucky., whose parents plan to enroll him on a worse of English and writing. training program

Should Chinese parents let their children play and get closer to nature, or have more classea so that they won't fall behind? Perhaps everyone has an answer in one's own heart.

［写作内容］

1.以约30个词概括上文的主要内容。

2.以约120个词对父母如何让孩子过暑假进行讨论，内容包括：

(1)你对孩子目前过暑假的看法；

(2)你打算怎样利用暑假

［写作要求］

1.作文中可以使用亲身经历或虚构的故事，也可以参照阅读材料的内容，但不得首」妾引用

原文中的句子

2.作文中不能出现真实姓名和学校名称

［写作标准］

概括准确，语言规范，内容合适，语篇连贯

世界历史上领土面积最大的帝国是哪个帝国（）

A、德意志帝国

B、蒙古帝国

C、中华帝国

D、罗马帝国

国家外汇管理局负责监控持证企业境外期货业务保证金账户和境内期货外汇专户。