问题 多项选择题

有关β-HCG转阴时间下列哪些是正确的()

A.葡萄胎清宫后84~100天,HCG值降到正常

B.人工流产后平均30天,HCG值降到正常

C.自然流产清宫术后平均29天,HCG值降到正常

D.足月分娩后平均12天HCG值降到正常

E.异位妊娠术后平均9天HCG值降到正常

答案

参考答案:A, B, D, E

单项选择题

A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains the range of news from local crime to international politics, from sports to business to fashion to science, and the range of comment and special features (特定) as well, from editorial page to feature articles and interviews to criticism of books, art, theatre and music. A newspaper is even more remarkable for the way one reads it never completely, never straight through, but always by jumping from here to there, in and out glancing at one piece, reading another article all the way through, reading just a few paragraphs of the next.
A good modern newspaper offers a variety to attract many different readers, but far more than any one reader is interested in. What brings this variety together in one place is its topicality (时事性), its immediate relation to what is happening in your world and your locality now. But immediacy and the speed of production that goes with it mean also that much of what appears in a newspaper has no more than transient (短暂的) value.
For all these reasons, no two people really read the same paper: what each person does is to put together out of the pages of that day’s paper, his own selection and sequence, his own news paper. For all these reasons, reading newspapers efficiently, which means getting what you want from them without missing things you need but without wasting time, demands skill and self-awareness as you modify and apply the techniques of reading.

It can be conclude from the passage that newspaper readers ______.

A. apply reading techniques skillfully
B. jump from one newspaper to another
C. appreciate the variety of a newspaper
D. usually read a newspaper selectively

问答题


某大型工程项目由政府投资建设,业主委托某招标代理公司代理施工招标。招标代理公司确定该项目采用公开招标方式招标,招标公告在当地政府规定的招标信息网上发布。招标文件中规定:投标担保可采用投标保证金或投标保函方式担保。评标方法采用经评审的最低投标价法。投标有效期为60d。
业主对招标代理公司提出以下要求:为了避免潜在投标人过多,项目招标公告只在本市日报上发布,且采用邀请招标方式招标。
项目施工招标信息发布后,共有12家潜在的投标人报名参加投标。业主认为报名参加投标的人数太多,为减少评标工作量,要求招标代理公司仅对报名的潜在投标人的资质条件、业绩进行资格审查。
开标后发现:
(1)A投标人的投标报价为8000万元,为最低投标价,经评审后推荐其为中标候选人。
(2)B投标人在开标后又提交了一份补充说明,提出可以降价5%。
(3)C投标人提交的银行投标保函有效期为70d。
(4)D投标人投标文件的投标函盖有企业及企业法定代表人的印章,但没有加盖项目负责人的印章。
(5)E投标人与其他投标人组成了联合体投标,附有各方资质证书,但没有联合体共同投标协议书。
(6)F投标人的投标报价最高,故F投标人在开标后第二天撤回了其投标文件。
经过标书评审,A投标人被确定为中标候选人。发出中标通知书后,招标人和A投标人进行合同谈判,希望A投标人能再压缩工期、降低费用。经谈判后双方达成一致:不压缩工期,降价3%。
[问题]

F投标人的投标文件是否有效对其撤回投标文件的行为应如何处理