乙社區CHD 的盛行率為多少？
\mathrm{16}^{0}/_{00}
\mathrm{16}^{0}
_{00}
\mathrm{20}^{0}/_{00}
\mathrm{20}^{0}
\mathrm{50}^{0}/_{00}
\mathrm{50}^{0}
\mathrm{80}^{0}/_{00}
\mathrm{80}^{0}
