【单选题】【消耗次数：1】
致病性G-细菌细胞壁组成中具有
①
核心多糖
②
O-侧链
③
类脂A
④
脂蛋白
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may
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might
③
could
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must
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①
but
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and
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though
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so
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supporting
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having supported
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being supported by
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being supported
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5.____the front door____, he had to enter the room through the back door.
①
Seen, painted
②
Seeing, painted
③
Being seen, being painted
④
Seeing, being painted
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having heard
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hearing
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beingheard
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put
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to be put
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to put
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breaking; running
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broken; running
③
breaking; run
④
broken; run
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tried; to be left
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had tried to; leaving
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tried to; left
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had tried; have left
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Having stolen
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Stolen
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to solve; being talked about
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solving; discussing
③
to solve; to talk about
④
solving; being discussed