题目内容
在日常生活中，有时候把上声调值读成214是错误的。
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“朗读”的“朗”调值是51。
16. In what case do you need to write a leave letter?When you need to be absent from your work for_______________.17. Why should you write a leave letter as early as possible?To allow your employer to_______________ for your leave.I8. What should you be specific about in your leave letter?You should be as specific as you can about the ______________.19. What should you be honest about with your boss?You should be honest about why you_________________.20. What details may you include in your leave letter?You may suggest how your work will be_______________.
肉芽组织中常见的细胞包括
下列哪种细胞属于永久性细胞
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