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>> 河南成教 / 数学教育学
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佳题速递：
(单选题) Stage plays, at first, seem a lot like films. Both use actors and dialogue and scenery. But if you try to make a film by setting up a camera in front of the stage, you will find it won't work. A film made in this way will leave the audience cold. And even worse you'll b3e wasting a powerful tool --- the camera.
A stage is actually a box. One side of the box has been removed so the audience can see what's going on inside. The actors remain at a fixed audience. In the film, however, the camera can bring the audience up close and fix their attention on small but important things: a frightened look, a whisper, a trembling of hands.
The camera offers the film maker freedom allowing him to move easily across barriers(界限) of time and space. He can show his action in real cities and on real farms. He can also use the camera to change the scene dozens of times in one film. No expert of the stage can do this.
The main idea of the text is that ________ . ( )
A、stage plays and films are two different kinds of artB、it is always disappointing to turn play into filmsC、films have certain advantages(长处) over stage playsD、the camera has made film making easy and possible [多选题]
不属于材料物理性能的是
A.强度
B.硬度
C.热膨胀性
D.耐腐蚀性金属工艺学 凸轮机构的从动件做（ ）运动时，其惯性冲击力有柔性冲击，但可避免。A、 等速 B、 等加速等减速 C、 摆线 D、 简谐机械设计基础 马的胃破裂时，出现
A.出热汗
B.出冷汗
C.疼痛不安
D.发热
E.兽医临床诊断学 (问答题) 题1图所示电路中,U相负载是一个220V、100W 的白炽灯, V相开路(S断开), W相负载是一个220V、60W 的白炽灯,三相电源的线电压为380V。求:(1) 各相电流和中性线电流。(2) 中性线因故障断开时,各负载两端的电压。电路与电子技术 [单选题]
当板桩或地下连续墙深入基坑底面以下一定深度，()达到减小动水压力防止流砂的目的。
A.挡住地下水
B.增长渗径
C.基坑支护
D.地下结构安装工程施工工艺