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【简答题】
定义在R上的函数y=f(x)满足条件:f(x)不是常值函数,且f(2-x)=f(x)与f(x-1)=f(x+1)对任意x∈R成立,给出下列四个命题: ①f(x)为周期函数; ②f(x)的图象关于直线x=1对称; ③f(x)的图象关于y轴对称; ④f(x)的图象关于原点成中心对称. 其中所有正确命题的序号是______.
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举一反三
【单选题】A doctor registered the latent period of 9 lyssa patient. The data is 2 weeks, 10 weeks, 5 weeks, 55 weeks, 8 weeks, 3 weeks, 125 weeks, 30weeks, 201 weeks. What is correct average latent period?
A.
48.8 weeks
B.
10 weeks
C.
30 weeks
D.
16.7weeks
【单选题】Which one is the most appropriate title of the article?
A.
Yahoo!'s X-Files
B.
Yahoo!'s Categories
C.
Yahoo!'s Sub-categories
D.
Movies and Music Online
【简答题】A.10 weeks. B.20 weeks. C.12 weeks. D.13 weeks.
【简答题】A.Three weeks. B.Nine weeks. C.Five weeks. D.Ten weeks.
【单选题】气管管壁可分为三层,由内向外分别是
A.
粘膜层、肌层和外膜
B.
上皮层、固有层、粘膜肌层
C.
粘膜、粘膜下层和外膜
D.
粘膜层、固有层和外膜
【判断题】由于切削变形复杂,在实际生产中常用理论公式计算切削力的大小。( )
A.
正确
B.
错误
【单选题】气管管壁可分为三层,由内向外分别是
A.
黏膜、肌层和外膜
B.
上皮、固有层、黏膜肌
C.
黏膜、黏膜下层和外膜
D.
黏膜上皮、黏膜肌和外膜
E.
黏膜、固有层和外膜
【简答题】Decide which of the words given in the box below would best complete the passage if inserted in the corresponding blanks. The words can be used ONCE ONLY. A. whether B. demanding C. accept D. proud E....
【单选题】气管管壁可分为三层,由内向外分别是
A.
粘膜、肌层和外膜
B.
上皮、固有层、粘膜肌
C.
粘膜、粘膜下层和外膜
D.
粘膜上皮、粘膜肌和外膜
E.
粘膜、固有层和外模
【简答题】A.4 weeks. B.6 weeks. C.8 weeks. D.10 weeks.
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