问题
选择题
| 选修3-4如图所示，白炽灯的右侧依次平行放置偏振片P和Q，A点位于P、Q之间，B点位于Q右侧．旋转偏振片P，A、B两点光的强度变化情况是（ ） A．A、B均不变 B．A、B均有变化 C．A不变，B有变化 D．A有变化，B不变．  |
答案
答案：C
搜题请搜索小程序“爱下问搜题”
| 选修3-4如图所示，白炽灯的右侧依次平行放置偏振片P和Q，A点位于P、Q之间，B点位于Q右侧．旋转偏振片P，A、B两点光的强度变化情况是（ ） A．A、B均不变 B．A、B均有变化 C．A不变，B有变化 D．A有变化，B不变． |
答案：C
| 从方框中选择合适的选项完成对话（其中有两项多余）。 | |
| David: Hello! I'm new here. My name is David. Glad to meet you. May I have a talk with you? Peter: Certainly. 1 David: Thanks. My first question is…Oh, yes, what do you like doing? Peter: I like reading books-all kinds of books. David: Oh, really? 2 Peter: I like math best. I think it's interesting. David: But I think it's a little difficult. 3 Peter: I hate to do chores. And I hate getting up early every morning. David: 4 Peter: Of course basketball. All the boys in our class like to play basketball. David: 5 Peter: You're welcome.
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