问题
问答题 简答题
如何鉴别射线探伤感光胶片上裂纹缺陷？
答案
参考答案：
裂纹在底片上呈略带曲折，波浪状黑色细条纹。有时也呈直线细纹，轮廓较分明、两端较尖细，中部稍宽、无分枝、两端黑度逐渐变浅，最后消失。
搜题请搜索小程序“爱下问搜题”
如何鉴别射线探伤感光胶片上裂纹缺陷？
参考答案：
裂纹在底片上呈略带曲折，波浪状黑色细条纹。有时也呈直线细纹，轮廓较分明、两端较尖细，中部稍宽、无分枝、两端黑度逐渐变浅，最后消失。
| 完形填空。 | ||||
| I think the best place to go on Sunday is the zoo. When you are _1_, you can go there with your family. _2_ the zoo, there are many animals: elephants, deer, _3_, rabbits and other animals. Elephants are the _4_ animals on land. I _5_ there is a baby elephant in our zoo. So I want to _6_at it. Yu Xuan wants to go with me. She says, "_7_we go there together?" "Sure!" I say. "We can _8_ a good time there. But let's _9_ there at half past four. I have _10_ homework to do." | ||||
|