综合题 适中0.65 引用1 组卷396
(1)平安镇被群山包围,难以获得阳光照射,工程师在位置A处安装平面镜,使广场中心B处被照亮.若太阳位于图中所在位置,请在A处添加平面镜并完成光路图.(保留作图痕迹)____
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/23cce041-4316-4f5f-8cb8-cbd58d7c7c70.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/1937bb80-92e8-4cc2-9577-8268625e3d30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/03c2ec1f-75a6-4194-9937-f4a6c1e3c772.png?resizew=343)
(2)图甲中体温计的示数是_____ ;乙图中机械秒表的示数是_____ s.
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/23cce041-4316-4f5f-8cb8-cbd58d7c7c70.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/1937bb80-92e8-4cc2-9577-8268625e3d30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1574791512989696/1574791533502464/STEM/03c2ec1f-75a6-4194-9937-f4a6c1e3c772.png?resizew=343)
(2)图甲中体温计的示数是
15-16八年级·河北石家庄·期中
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