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问题 单项选择题

图示两木杆（Ⅰ和Ⅱ）连接接头，承受轴向拉力作用，错误答案是（）。

A．1—1截面偏心受拉

B．2—2为受剪面

C．3—3为挤压面

D．4—4为挤压面

答案

参考答案：D

解析：

挤压面是3-3面。

单项选择题 案例分析题

患者男，20岁，因“口角歪斜1d”来诊。1d前午睡时受凉，醒后发现口角歪斜。今日右眼闭合困难，流泪，右耳后疼痛。查体：右侧额纹变浅，右侧眼睑闭合不全，右侧鼻唇沟变浅，示齿口角偏向左侧，右侧其他脑神经检查未见异常；四肢肌力、肌张力正常，巴宾斯基征（－）。

为了判断恢复程度，应做的检查是（）

A.脑脊液

B.脑电图

C.颅脑MRI

D.面神经传导速度

E.面神经病理
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填空题


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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