您要查找的是不是：
- alkali telluride photo cathode 碱碲光电阴极
- The interior of the tube must be kept a hard vacuum to preserve the photo cathode. 显象管内部一定要保证高真空才能保护光电阴极。
- A display device that uses a cathode ray tube. 一种使用阴极射线管的显示装置。
- Keep the sun behind you when you take a photo. 拍照时要让太阳留在你的身后。
- This kind of soil contains much alkali. 这种土壤含碱丰富。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- Many a time have we come across this same photo. 我们多次都见到过这同一张照片。
- He adjusted the shutter before taking a photo. 在照相前，他调整了快门。
- The woman on the photo is my paternal grandmother. 照片上的这个妇人是我祖母。
- He took a lot of photo last sunday, and so do I. 他上星期照了许多照片，我也一样。
- The photo made him quite attractive. 照片把他拍得相当英俊。
- That photo is a good likeness of David. 戴维那张相片照得很像。
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- He hit upon a photo taken ten years ago. 他偶然发现一张十年前拍的照片。
- The photo shows her dressed in black. 在这张照片里，她穿著黑衣服。
- I got her in focus before I took the photo. 我在拍摄前先用镜头把她对清楚。
- The photo has faded beyond recognition. 相片已经模糊，不能辨认。
- The baby wouldn't stay put long enough for the photo to be taken. 这孩子总动换，拍不了照片。
- German physicist. He won a1905 Nobel Prize for his work on cathode rays. 勒纳，菲利普1862－1947德国物理学家。因在阴极射线方面的成果而荣获1905年诺贝尔奖
- Cyclization occurs readily with dilute alkali. 遇到稀碱就容易环化。
