糖皮质激素治疗葡萄膜炎（）A.急性前葡萄膜炎一般不宜使用糖皮质激素结膜下注射 B.在

下列离子方程式书写正确的是（　　）

A．碳酸氢钠溶液跟稀盐酸反应：HCO₃^-+H⁺=H₂O+CO₂↑

B．碳酸钙与稀硝酸反应：CO₃^2-+H⁺=H₂O+CO₂↑

C．钠与水反应：Na+H₂O=Na⁺+H₂↑+OH^-

D．稀硫酸与氢氧化钡反应：H⁺+OH^-=H₂O

豌豆的紫花和白花是一对相对性状，这对相对性状由等位基因A，a控制。右表是豌豆花色的三个组合的遗传实验结果。请分析回答：

(1)孟德尔选用豌豆做实验，原因是豌豆有许多的优点，其主要优点之一是自花传粉，闭花受粉；另一优点是_______。

(2)根据组合_______能判断出________是显性性状。

(3)请写出组合一亲本基因型：____________。

(4)组合三的F₁显性类型植株中，杂合子占的比例是___________。

(5)若取组合二中的F₁紫花植株与组合三中的F₁紫花植株杂交，后代出现白花植株的概率为_________。

(6)有一株紫花豌豆，要判断其基因型，最好的方法为__________。

(7)请写出组合三的遗传图解

马克思、恩格斯在《 * * 党宣言》中写道：“让统治阶级在 * * 主义革命面前发抖吧。无产阶级在这个革命中失去的只是锁链。他们获得的将是整个世界。”文中的“锁链”指[ ]

A．贫穷与落后

B．专制与愚昧

C．资本主义经济危机

D．资本主义剥削制度

Microsoft has a problem：It desperately wants the remaining Windows XP users to upgrade to a newer version of the operating system but a good many of them still haven’t started．The latest numbers from NetMarket show that Windows XP still accounts for around 29．5％of all desktops in use even though Microsoft is due to end support for the l3-Year-old platform on April 8th．ZDNet reports that Microsoft plans to force remaining XP users to start next week by sending them notices reminding them again that it will end XP support within a month．

However, as Computerworld reports，Microsoft may have a tough time convincing some Windows XP users to upgrade because it's trying to sell them on Windows 8，the newest operating system that has angered many longtime PC users by removing the traditional Start menu and by adding the interface(界面)a special feature．Computerworld writes that many Windows users expressed anger last month when Microsoft asked them to help switch as many people as they could from Windows XP to Windows 8 partly because Microsoft hasn’t offered any sort of discount for Windows XP users making the switch．

This is particularly tiresome, these users said，because switching from XP to Windows 8 won’t just require a software upgrade but will instead likely force them to buy new machines capable(能够)of running Microsoft’s new operating system．Some users were also annoyed that Microsoft only mentioned Windows 8 and not Windows 7 as upgrade possibilities．

In the end，it looks like when Microsoft ends support for Windows XP next month there will still be a large part of the desktop PC world using the platform．Hackers who have been saving up all their best new malware(恶意软件)for the day when Windows XP support ends are about to have a field day．

小题1:What problem does Microsoft have now?

A．Windows XP is out of date and needs improvement．

B．Windows 8 runs worse than Windows XP．

C．No people like to upgrade their operating system．

D．Lots of users refuse to switch from XP to Windows 8．小题2:How will Microsoft remind users ofthe stop of XP support?

A．By sending them notices．

B．By sending them daily emails．

C．By adding the interface a special feature．

D．By removing the traditional Start menu．小题3:Which is probably one of the reasons why users dislike Window 8?

A．Microsoft hasn’t offered any discount for it．

B．They like Window 7 more than Window 8．

C．Microsoft refuses to offer them a new machine．

D．It’s impossible for them to use the new operating system．小题4:What does the underlined phrase “have a field day” probably mean in the last paragraph?

A．Show up without warning．

B．Make rapid progress．

C．Make full use of the opportunity．

D．Come to an end completely．小题5:What can be inferred from the text?

A．Windows XP will completely be out of use in a month．

B．Windows XP will still be in use for a period of time．

C．Windows 8 will have a longer history than Windows XP．

D．Windows 7 will easily be attacked by Hackers．

精装书芯压平的作用是什么？