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【单选题】
关于各种介质对真空的折射率的下列说法,正确的是
A.
一定大于1,空气的折射率可近似等于1
B.
一定小于1
C.
可能大于1,也可能小于1
D.
严格等于1
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A.
细菌在局部一个毛囊内产生化脓性感染
B.
细菌进入血液循环中,迅速大量繁殖,产生大量毒素,全身中毒症状严重
C.
大量细菌毒素入血,引起全身中毒症状者
D.
局部病灶内化脓性细菌栓子,并产生转移性脓肿
E.
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A.
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B.
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C.
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D.
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A.
正确
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【单选题】败血症是指
A.
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B.
细菌不在血中,毒素入血,有全身中毒表现
C.
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D.
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A.
菌血症
B.
败血症
C.
毒血症
D.
脓毒血症
E.
以上都是
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