【单选题】
A <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}><{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>无窗无自然采光无通风<{/td}>
<{/tr}>
<{/tbody}><{/table}><{/td}>
<{/tr}>
<{/tbody}><{/table}>
B <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}><{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>有窗但窗户不可开启无通风<{/td}>
<{/tr}>
<{/tbody}><{/table}><{/td}>
<{/tr}>
<{/tbody}><{/table}>
C <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}><{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>有窗可开启,无自然采光及无自然通风<{/td}>
<{/tr}>
<{/tbody}><{/table}><{/td}>
<{/tr}>
<{/tbody}><{/table}>
D <{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}><{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}><{table}>
<{colgroup}><{col}>
<{/colgroup}><{tbody}><{tr}>
<{td}>有窗可开启,自然采光通风<{/td}>
<{/tr}>
<{/tbody}><{/table}><{/td}>
<{/tr}>
<{/tbody}><{/table}><{/td}>
<{/tr}>
<{/tbody}><{/table}>
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