由以上数据，下列结论中可以推出的是（）。 A．10-12，月“家电下乡”产品中，销售

We are in a world full of competition. Our parents compete (竞争) with others in their offices, our brothers and sisters compete with others in their colleges, and we compete with our classmates in school. Many of us give up in the face of competition and will never be successful. ①can’t, others, why, we, do, better, than One important reason is that we have no self-confidence (自信).

In fact, everyone is born equal. You can do what others do. Although your classmates may be better than you in some ways, you may be better than them in other subjects. So everyone has his or her own advantages. Don’t look at things from a single (单个的) point of view. Try to discover your own advantages, and believe that you can do better than others in those ways.

Competition is not so terrible. Don’t be afraid of it. And don’t be afraid of those classmates who are better than you. ②Remember that self-confidence is the first step to success. Believe in yourselves, and you will be successful one day.

任务一:小题1: Are we living in a world full of competition?

任务二: 小题2: How can you improve your self-confidence according to the passage?

任务三: 小题3: 将①处画线部分单词连成一个完整的特殊疑问句。

任务四: 小题4: 将②处画线部分译成中文。

任务五: 小题5: What’s the main idea of this passage?

二尖瓣型P波是指（）

A.P波形态高尖，时限<0.11秒

B.P波切迹、切迹间距<0.04秒

C.P波切迹，切迹间期>0.04秒，P波时限>0.11秒

D.P电轻左偏

E.PtfV1>-0.04mm·s

Windows 98提供了多种网络连接功能和网络应用软件。在下列有关Windows 98网络通信功能的叙述中，正确的是

A．应用程序可以通过使用Windows API来调用Windows 98提供的网络通信功能

B．无论PC机配置如何，Windows 98一经安装几会自动地安装TCP/IP协议

C．使用Windows 98的PC机只能作为客户机使用，不能作为任何形式的服务器

D．Windows 98与Windows 98 SE均提供Internet连接共享功能

数控系统中最容易发生故障的部分是（）。

A、数控（NC）部分

B、电源部分

C、输入/输出接口部分

D、伺服电机

颗粒在水中的沉淀类型及其特征如何？