题目内容

Scholars and gurus re-interpreted them all the time, but one could always go back to the original ________.

A. file
B. version
C. context
D. devotion

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There is an illness that can result in total blindness ________ it is left untreated.

A. unless
B. although
C. but
D. if

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二层入户横支管⑨→⑦轴处DE20管道长度(含垂直段)为()m

二层入户横支管E轴→C轴处DE50管道长度为()m

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