9. In the five-digit number abcde, $a, b, c, d, e$ represent its ten-thousands, thousands, hundreds, tens, and units place values, respectively. If $\mathrm{d}>\mathrm{e}, \mathrm{c}>\mathrm{d}+\mathrm{e}, \mathrm{b}>\mathrm{c}+\mathrm{d}+\mathrm{e}, \mathrm{a}>\mathrm{b}+\mathrm{c}+\mathrm{d}+\mathrm{e}$. Then, the largest five-digit number that satisfies the above conditions is $(\mathrm{N}$).
【Analysis】Extremum problem. From the problem, we get: $\mathrm{a}$ is maximized at $9, \mathrm{~b}+\mathrm{c}+\mathrm{d}+\mathrm{e}=8$, next, to maximize $\mathrm{b}$, $\mathrm{c}+\mathrm{d}+\mathrm{e}$ needs to be as small as possible, $\mathrm{e}$ is minimized at 0, then $\mathrm{d}$ is minimized at $1, \mathrm{c}$ is minimized at 2, at this point $\mathrm{b}$ is maximized at 5, so the required 5-digit number is 95210.