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与路由器R2的f0/0端口连接的局域网LAN1是一个末节网络，而且已接近饱和，为了减少流量，需要过滤进入LAN1的路由更新。此时，在路由器R2上需要完成以下与之相关的配置。请将(1)空缺处的内容填写完整。
R2 (config) # router rip
R2 (config-router)# ______ f0/0

答案

参考答案：passive-interface

解析：被动接口是指阻止路由更新报文通过的路由器接口，即被动接口只接收路由更新但不发送路由更新。在RIP路由配置模式下，使用命令passive-interface指定一个路由器接口为被动接口。passive-interface命令可用于所有IP内部网关协议(如RIP、IGRP、EIGRP、OSPF和IS-IS等)。本问题要求过滤进入LAN1的路由更新，可将路由器R2连接LAN1的f0/0端口配置为被动接口。其相关的配置过程示例如下：
R2(config)#router rip
R2(config-router)# passive-interface f0/0

单项选择题

下列有关渠道横断面测绘，不正确的是（）。

A、一般在一个测站就可以完成一个横断面的水准测量

B、横断面水准测量必须注意横断地面线与渠边中心线要严格垂直

C、绘制出横断面图时一般把中心桩的位置定在方格低的中央，注上标桩号，然后通过中心桩画出纵横座标轴

D、比中心点高的点高差前写“-”号，比中心点低的点高差前写“+”号
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A How to Use a Painting Knife 使用画刀的方法
Painting with a knife is a bit like putting butter on bread and produces quite a (1) result to a brush. Painting knives are excellent for producing textured, impasto work and (2) areas of flat colour.
What’s the difference between a palette knife and a painting knife
A palette knife is a long, straight spatula that is used (3) mixing paints and scraping a palette clean. They’re made from metal, plastic, or wood and (4) either be completely straight or have a slightly bent handle. A painting knife has (5) large crank in the handle, which takes your hand away from the painting surface. They (6) in numerous shapes(for example pear-, diamond-, or trowel-shaped) and are used for painting (7) of a brush. The edge of the knife is blunt, so that it doesn’t cut the (8) .
·What shape of painting knife should I use
Different shaped painting knives produce different effects. For example, a short blade produces angular strokes (9)a long blade makes it easy to put down sweeps of colour.
·Why can’t I use a palette knife to paint with
You can. Painting (10) just have the advantage of coming in more angular shapes and with sharper points. And (11) larger crank in the handle means there’s less chance of rubbing your knuckles into wet (12) . If you’re unsure whether you’re going to enjoy painting with a knife, first buy a (13) , plastic palette knife and experiment a bit with this before upgrading to a wood-and-metal knife.
·How do I use painting knife
(14) the handle firmly so you’re got good control. Pick up some paint off your palette (15) the tip, as you’d pick up some butter with a knife. Use the side of the (16) to spread paint across your canvas, or press it onto the canvas, as you (17) spread butter across a slice of bread．It’ll seem strange at first as it’s quite (18) to using a brush. Using just the tip of the blade will produce small dots. (19) the edge of the knife down will produce fine lines. Pressing the blade flat down (20) the paint will produce ridges. Scrape back into the paint to reveal underlying layers (called sgraffito).

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