问题
单项选择题
咽后壁的特点正确的是（）。
A.粘膜下有丰富的血窦
B.无明显粘膜下组织，纤维层与粘膜层紧密附着
C.粘膜层为单一的复层鳞状上皮构成
D.淋巴组织稀少
E.没有肌层
答案
参考答案：B
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咽后壁的特点正确的是（）。
A.粘膜下有丰富的血窦
B.无明显粘膜下组织，纤维层与粘膜层紧密附着
C.粘膜层为单一的复层鳞状上皮构成
D.淋巴组织稀少
E.没有肌层
参考答案：B
Jim likes reading very much. One day, he wants to borrow a book from the . He goes there Jack. They can’t see librarians, only some robots (机器人) standing there. Then Jim says to one of , “Hey, give me a book.” But the robot work. “ is wrong with the robot?” he asks Jack. Jack tells him, “When you want something from somebody, you must say ‘ ’ first.” So Jim says, “Please me a book, Mr. Robot.” Then the robot brings him the book. But again, Jim can’t take the book out of the robot’s hand. Jack says, “You must say ‘Thank you’ before you take the book.” Jim says “Oh, thank you very much, Mr. Robot.” Then he gets the book he wants from the robot.
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