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【多选题】
在下列哪些情况下正常菌群变为条件致病菌A.
机体免疫功能下降
B.
菌群失调
C.
生物拮抗作用
D.
寄居部位改变
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举一反三
【单选题】Dressing is a task which we do everyday as a matter of _______.
A.
routine
B.
schedule
C.
habit
D.
manner
【单选题】The manner in which a telephone is answered gives the image of the organization, so polite and pleasant when answering the telephone.
A.
being
B.
be
C.
to be
D.
having been
【单选题】下列关于釉质的叙述哪项错误
A.
釉柱是细长的柱状体
B.
釉柱起自釉质牙本质界，贯穿牙釉质全层
C.
在窝沟处，釉柱从釉牙本质界向窝沟底集中
D.
釉柱并非一条直线，近表面1/3弯曲，内2/3较直
【简答题】The speed of communications today, as opposed to ______ , has greatly altered the manner in Which business is conducted． A．the one of yesterday B．communications yesterday C．that of yesterday D．c...
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