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【单选题】
苯染毒大鼠100只中,有50只发生了红细胞数降低,即效应发生率为50%,此为A.
量反应
B.
质反应
C.
剂量—效应（反应）关系
D.
不遵循剂量—效应（反应）关系
E.
剂量—效应曲线。
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举一反三
【简答题】After an(introduce)______by the chairperson，we’11 go on with the day’s discussion.
【单选题】I must go there earlier. John has suggested that I _____an hour before the discussion begins.
A.
will go
B.
shall go
C.
go
D.
would go
【单选题】After discussion, We ______ Australia. [ ]
A.
decided to go to
B.
decided on going
C.
decided to go
【单选题】The discussion will go on until all the members reach the point ______they all agree on that issue.
A.
which
B.
where
C.
that
D.
when
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