①1999×2001,②992-1

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问题:

①1999×2001,②992-1

考点:平方差公式
题型:解答题

如图所示,老师在演示用过氧化氢和二氧化锰制取氧气的实验中,收集完氧气后,反应还在继续进行.小明同学认为,这个装置的缺点是不能控制反应随时发生、随时停止,造成了药品的浪费.为了解决小明提出的问题,请你对原实验装置加以改进,或设计新的简易实验装置,以便有效地控制过氧化氢的分解反应.

友情提示:你可从下列用品中选取,也可自行选用其它仪器.

A、分液漏斗通过旋转活栓能够分次加液体

   

B、装有二氧化锰的小布袋允许双氧水透过,不允许二氧化锰透过

C、注射器

D、大试管

E、止水夹

请你至少写出两种方案:方案一:______;方案二:______.

题型:解答题

NEW YORK, May 19—A new, more destructive version of the “Love Bug ” virus is slowly spreading across the world, but so far the damage is small compared with its former version.

The new Love Bug virus creates disorder.

Richard Saunders of anti-viral firm Symantec said the virus only affected a dozen companies around the world.

“While it is a nasty virus, it’s not spreading anywhere near the rate Love But or (last year’s ) Melissa was spreading,” Saunders said.

“New Love” is similar in form to the Love Bug, which swept the world two weeks ago and caused more than $ 10 million in damages. But it’s much more destructive. The virus appears as an attachment to an e-mail whose subject begins with “FW”

If a user clicks on the attachment’s scroll-like icon(卷轴样的图标), every file on his hard drive is destroyed.

“Basically, it’s going to destroy your machine, ” said Eric Chine, chief researcher at Symantec’s anti-virus lad in the Netherlands.

The Love Bug only killed a small set of files, including graphic files. This virus even wipes out the Windows operating system.

Attorney General Janet Reno warned the public at a news conference today to be careful of any suspicious e-mail with attachments. “Do not open it, even it comes from a trusted source.” she said.

Don’t Open That Attachments.

Like the Love Bug, after the e-mail attachment is opened and the virus is carried out, New Love sends itself to everyone in a victim’s Microsoft Outlook address book. Fortunately for users, the lesson is the same as from the Love Bug: If you see a message with an attachment whose name ends in vbs, with a scroll-like icon, don’t click on the attachment. Also like the Love Bug, this virus only affects computers running Windows 98, NT 4.0 Windows 95 with Internet Explorer 5.0 and can only spread if users rely on a Microsoft Outlook address book for e-mail. Microsoft will soon give a fix for Outlook that warns people or suspicious attachments, the company said.

68. According to the passage, so far the new Love Bug virus _________.

A. has made the whole world disordered     

B. causes more damages than other forms of virus

C. is the newest and spreading the fastest 

D. has affected 12 companies around the world

69. Computer users are warned in this article _________.

A. not to suspect e-mails beginning with “FW” subjects

B. not to open attachment of doubtful e-mails

C. to stop using Microsoft Outlook address book

D. to examine the Windows Operating System carefully

70. It can be suggested from the passage that _________.

A. the mail sent by a friend is surely free of the virus 

B. the Microsoft Company will take action against the virus

C. all computers running Windows 98 will be affected

D. the users can not find the way to deal with the Love Bug.

71. The author writes this passage in order to _________.

A. compare some types of virus                        

B. explain how the Love Bug is formed

C. tell the readers something about a new virus   

D. remind computer companies to kill the virus

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试述改革开放和现代化建设的历史进程和基本经验。

题型:解答题

女,38岁,接触性出血1月余,白带有恶臭,妇科检查,宫颈Ⅱ度糜烂,前唇有5cm3的质地脆赘生物,易出血。子宫正常大,三合诊(-)。

确诊后,其临床期别为()。

A.Ia期

B.Ib1期

C.Ib2期

D.Ⅱa期

E.Ⅱb期

题型:解答题

女性,60岁,因发热、纳差、厌油、尿黄一周入院。发热持续4天后加重,皮肤和巩膜明显黄染。肝肋下1.5cm,质软,有触痛、脾未及。ALT 620IU/L,TBil 220μmol/L,DBil 120μmol/L,PTA 80%。患者5年前注射过乙肝疫苗,无输血史及服药史。1个多月前曾到外地旅游8日,平日体健

诊断首先考虑

A.急性胆囊炎

B.无痛性胆石症

C.急性黄疸型肝炎

D.急性重型肝炎

E.肝癌

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