光学是一门有悠久历史的学科,它的发展史可追溯到2000多年前.下列有关光的一些现象中说法正确的是( )
A:用标准平面检查光学平面的平整程度是利用光的偏振现象
B:在光导纤维束内传送图象是利用光的全反射现象
C:用三棱镜观察太阳光谱是利用光的折射现象
D:电视机遥控器是利用发出紫外线脉冲信号来变换频道的
E:在太阳光照射下,水面上油膜出现彩色花纹是光的干涉现象
根据对话情景,填入恰当的单词。A: Good morning! Can I help you?B: Good morning! Yes, please. I think that this house is for ____ A: That's right.B: May I have a look at it?A: ____ . Come in, please.B: How long have you lived here?A:____ ten years. I have been here since 2001.B: How much does it ____ ?A: 8600 pounds.B: That's a lot of ____ !A: It's worth every penny of it.B: I like it very much. But I can't____ yet. My wife must look at it first.A: Women always have the last words.
******在北京大学考察时说,核心价值观承载着一个民族、一个国家的精神追求,广大青年要从现在做起,从自己做起,勤学、修德、明辨、笃实,使社会主义核心价值观成为自己的基本遵循。***的讲话启示我们( )
①同心同德,坚定共产主义共同理想
②身体力行,自觉践行核心价值观
③厚德载物,追求更高的道德目标
④志存高远,铸造中华文化新的辉煌
矮秆的麦田里,长出一株高秆的小麦,这中现象属于( )