某工程两劳务分包单位签订了安全生产管理协议，该协议应明确的内容有（）. A.各自应负

判断急性乳腺炎形成脓肿的依据是：（）

A.搏动性疼痛

B.局部有波动感

C.高热、寒战

D.穿刺有脓液

E.压痛明显

起重机上采用的齿轮联轴器是刚性联轴器的一种，因此适应零部件的安装与调整。

Life on-line can be a much richer experience when you aren’t restricted to just written words and still pictures.Even if you’re new to the Net,you’ve probably heard about multimedia on-line—listening to audio,watching animations and videos,even playing in three-dimensional space.Sound and movement make information come alive.

To experience it,you’ll need special pieces of software called plug-ins.The term “plug-in” refers to a small,add-on piece of software which extends the capabilities of your web browser,like Netscape Navigator or Microsoft Explorer,turning your computer into a radio or TV.

When you arrive at a web page which contains a file requiring a plug-in which you don’t have,you will usually receive a message asking if you want to get it by downloading it and installing it into your computer.Most of the time,the installation will be automatic.

Occasionally,you’ll run into a downloaded file which needs to be decompressed or un-zipped before installation.Once installed,plug-ins run automatically,without you having to do anything.

Many multimedia controls still need to be obtained from the developer but are installed automatically.

Shockwave is a good example of this.All you need to do is go to the Macromedia site and click on the link to install the ActiveX control.The rest happens automatically.The next time you go to a “Shocked” website,the Shockwave control loads and plays the movie.

Most plug-ins and controls can be downloaded for free on the Internet,although not all will work with every system.Some of them,for instance,only work with Windows 95.

小题1:Plug-ins can help us to do all of the following except _________.

A．listening to music

B．watching animations and videos

C．playing three-dimensioned games

D．searching for information on the net小题2:The correct explanation about “plug-in” is _________.

A．a radio or TV connected with a computer

B．a small,add-on piece of hardware which improves your web browser

C．a small,add-on piece of software which can turn your computer into a radio or TV

D．a small,add-on piece of software like Netscape Navigator or Microsoft Explorer小题3:When we go to a “shocked” website a second time,_________.

A．we should go to the Macromedia site and click on the link to install the Active X control

B．the shockwave control loads itself and plays the movie for us

C．we will be asked whether to download the shockwave control or not

D．we have to buy the shockwave control and load it小题4:Most of the time,how can we get a plug-in before automatic installation?

A．We have to buy it from the developer.

B．We have to borrow it from the developer.

C．We have to rent it from the developer.

D．We can obtain from the developer without paying.

某企业原材料按实际成本进行日常核算。2005年3月1日结存甲材料150公斤，每公斤实际成本为20元；3月15日购入甲材料140公斤，每公斤实际成本为25元；3月31日发出甲材料100公斤。如分别按后进先出法和先进出法计算3月份发出甲材料的实际成本，两种方法的计算结果相比较，其差额为( )元。

A．200

B．250

C．500

D．700

Web应用的认证与会话处理不当，可能被攻击者利用来伪装其他用户身份。强认证手段不包括如下哪种？（）

A、静态密码

B、短信挑战

C、指纹认证

D、图片认证