下面是按一定规律排列的一列数：
第1个数：$\frac{1}{2}-\left(1+\frac{-1}{2}\right)$；
第2个数：$\frac{1}{3}-\left(1+\frac{-1}{2}\right)\left(1+\frac{{\left(-1\right)}^2}{3}\right)\left(1+\frac{{\left(-1\right)}^3}{4}\right)$；
第3个数：$\frac{1}{4}-\left(1+\frac{-1}{2}\right)\left(1+\frac{{\left(-1\right)}^2}{3}\right)\left(1+\frac{{\left(-1\right)}^3}{4}\right)\left(1+\frac{{\left(-1\right)}^5}{6}\right)$；
……第n个数：$\frac{1}{n+1}-\left(1+\frac{-1}{2}\right)\left(1+\frac{{\left(-1\right)}^2}{3}\right)\left(1+\frac{{\left(-1\right)}^3}{4}\right)...\left(1+\frac{{\left(-1\right)}^{2n-1}}{2n}\right)$．
那么，在第10个数、第11个数、第12个数、第13个数中，最大的数是（   ）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Carol is a middle school student；She does well in only one subject.That is1.  Carol always does her history homework well and2good grade(分数)in history tests She likes her history teacher Mr．Aragon．She feels that he is like her3．

    At a parent—teacher meeting，Carol's mother has a4with Mr．Aragon．She says that Carol doesn't do well in5subjects．She hopes Mr．Aragon can6her．"Oh．I didn't know that．She is7．I'll try to talk to her,"says Mr．Aragon．

    When Mr．Aragon talks with Carol8her other subjects，Carol doesn't feel good，9she is grateful(感激的)．She knows that Mr．Aragon is trying to help．Carol 10his advice(建议)and tries to do well in other subjects．

下列哪一项既是光合作用的原料，又是呼吸作用的产物？（    ）