根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    For college students, graduation signals an exciting new beginning. ____ Many students wonder: What do I do now? What career is best for me? Most expert advice on choosing careers boils down to the following points.

Knowing Yourself

    What are your interests? Abilities? Skills? ____ The results may surprise you! These can be useful, but they're not the last word.

Investigating

    Investigating occupations is much more difficult. For most people, there isn't just one ‘right' job, but several that could be satisfying. ____ Talk to people who have occupations that interest you. Find out what they like and dislike about their job.

____

    Many people choose their careers because they believe strongly in a particular cause. Some might choose to work in areas like medicine, charity or environmental protection. Some have a strong interest in history or a love for the arts. ____ So in cases like these, the field is often chosen first, rather than the occupation itself. So if you've chosen a field, self-assessment will help you find your place in it. Invest some time and effort, and find the right career for you.

（Ⅰ）求函数f（x）的单调区间；

（Ⅱ）当a＞0时，若f（x）≥0对任意的x∈R恒成立，求实数a的值；

（Ⅲ）求证： $ln1+\frac{2\times 3}{{\left(3-1\right)}^2}+ln1+\frac{2\times 3^2}{{\left(3^2-1\right)}^2}+\cdots +ln1+\frac{2\times 3^n}{{\left(3^n-1\right)}^2}<2$ ．

在制作洋葱表皮细胞临时装片时，正确的染色方法应是(    )

1894年在顾拜旦的倡议之下国际奥委会成立，使原来古希腊各城邦之间举行的古奥运会变成了今天全世界都可以参加的现代奥林匹克运动。据说古希腊奥运会是为祭祀宙斯神而举办的，运动会期间各邦必须停战，优胜者将被看做是英雄。同时，还规定参加运动会的每个竞技者必须是纯希腊血统、未受过任何刑罚的自由男子，且禁止妇女参加和观看运动会。对上述材料理解有误的是