一束太阳光通过三棱镜折射后，被分解成七种颜色的光，在白色光屏上形成一条 * * 光带，如图所示，这个现象叫光的________________ ．如果将白色光屏换成红色光屏，我们将________________ （选填“能”或“不能”）看到 * * 光带．
色散 不能
（1）当太阳光经过三棱镜后，会分解成红、橙、黄、绿、蓝、靛、紫七种单色光，这是光的色散现象；
（2）在三棱镜和白屏之间放一块红色光屏，白屏上只在原来出现红光的地方出现一条红色光带；这表明红色光屏只能透过红光．
故答案为：色散；不能．
An old friend from abroad（国外）__16__ I wanted to stay with telephoned me from the airport to tell me that he had arrived. I was still in the __17__, but I had done something to get ready for his coming. After explaining where my new room was, I told him __18__ I had left the key under the doormat（门垫）. __19__ I would be home rather __20_, I asked him to go into the kitchen and __21__ himself to some food and drink. Two hours later, my friend telephoned me from the __22__. At the moment, he said __23__ was __24__ the radio __25__ having a truly wonderful meal. He had cooked two eggs and helped himself __26__ some __27__ chicken from the refrigerator. Now, he said, he was drinking a glass of milk __28__ he hoped I would __29__ him. When I asked him if he had __30__ the room without __31__, he answered that he had __32_ been able to find the key under the doormat. As the living-room window just __33__ the apple tree had been left _34__, he had climbed in. I listened to all this in __35__. There in no apple tree in front of my living-room. There is one in front of my neighbor’s.
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