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【单选题】
慢性毒性试验的目的不是A.
确定长期接触毒物造成生物体损害的阈剂量
B.
观察慢性毒性的毒作用靶器官
C.
观察慢性毒性效应谱
D.
观察慢性毒性作用特点
E.
确定长期接触毒物对生物体有害的最大作用剂量
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反馈参考答案：
举一反三
【单选题】We can do the work better with______money and ________ people.
A.
less, fewer
B.
fewer, less
C.
little, little
D.
few, few
【单选题】We can do the work better with ____ money and ____ people. [ ]
A.
little;fewer
B.
fewer;less
C.
less;fewer
D.
few;little
【简答题】园林规划设计必须遵循的原则是“（）”。
【单选题】We can do the work better with ________ people and _______ money.
A.
less, fewer
B.
fewer, less
C.
least; fewest
D.
fewest; littlest
【单选题】We can do the work better with ______ money and ______ people. [ ]
A.
less…fewer
B.
fewer…less
C.
more…fewer
D.
fewer…fewer
【单选题】We can do the work better with ______ money and ______ people.
A.
little, few
B.
few, little
C.
less, fewer
D.
fewer, less
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