题目内容

It is frequently considered less important to monitor for the presence of ___________ agents in conventional animals than in their rederived, barrier-maintained counterparts.

A. aquired
B. wanted
C. unwanted
D. safe

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Animal euthanasia is the act of putting an animal to death or allowing it to die by withholding extreme _____________ measures.

A. chemical
B. physical
C. medical
D. biological

TheUSAnimalWelfareActwaspassinAug 24_______.

A. 1955
B. 1960
C. 1966
D. 1970

The US Guide for the Care and Use of Laboratory Animals (8th Edition) was published in _______.

A. 1998
B. 2005
C. 2011
D. 2015

OnDec24 _______,theUSCongressamendstheLaboratoryAnimalWelfareAct(P.L.91-579),renamedtheAnimalWelfareAct,extendingprotectiontoallwarm-bloodedanimalsinlaboratories.

A. 1960
B. 1966
C. 1970
D. 1975