Mr. Williams had a lot of boats, and the fishermen borrowed them from him. Mr. Smith and his son, Daniel, borrowed one yesterday. They fished in some places, but caught nothing. Then they found a very good place, and caught about thirty fish there in an hour.
    Then it was late, and Mr. Smith said, "Go back now, Daniel.”
    Daniel said, "I'm going to come here again tomorrow.”
   “Me, too,”said his father, "But how are we going to find the place again?”
    Daniel said, "That's easy. Look! I've made a mark on the side of the boat.”
    His father laughed and said, "No, that's foolish! Mr. Williams doesn’t lend us the same boat every time!”
    Judge the following sentences true (T) or false (F) .

已知单调递增的等比数列{a_n}满足：a₂+a₃+a₄=28，且a₃+2是a₂，a₄的等差中项．

（Ⅰ）求数列{a_n}的通项公式；

（Ⅱ）若b_n=a_n+${\log }_{\frac{1}{2}}$a_n，S_n=b₁+b₂+…+b_n，求S_n．

图分别表示人体身高、生殖腺随年龄变化的发展趋势．根据图甲的曲线变化规律，可判断出图乙中A和B的结构名称分别是（　　）

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修改病句

九年级五班的语文成绩是全校最好的一个班级。

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