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相关的调研结果显示，色彩可以为品牌或者产品的信息传播扩展60％的受众，提升75％的群众认知理解力。
A、正确
B、错误

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单项选择题
关于铁道转弯处内外铁轨间的高度关系，下列说法正确的是（ ）　　
A. 内外轨一样高
B. 因为列出转弯有可能内向倾倒，一般内轨高于外轨
C. 外轨高于内轨，可以减少车轮与轨道的挤压，列车可顺利过弯
D. 以上说法均不正确
单项选择题
Activity Two: Writing Practice
     A head-teacher is speaking to a teacher in her school. “Next week we’re going to clean the school as follows: Classroom Building 1 on Monday. Building 2 on Tuesday. The computer room and sound lab on Wednesday. The science labs on the Thursday. The library and the Teachers’ Rooms on Friday. Please write a notice for the students and put it up. Thank you.”
    Work with your partner and write a large notice. Start like this:
    Classroom Building 1 will be…
Does Activity Two has a communicative purpose?
A、正确
B、错误
问答题
实际光波产生干涉的三个必要条件，两叠加光波         相同、振动方向相同、相位差恒定。​
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