A greater risk arises from animals which have been bred or housed in experimental units where less attention may be paid to ____________ hygienic measures compared with breeding units.

On Aug 24 1966, the Laboratory Animal Welfare Act (P.L. 89-544) was signed into law. The Act sets minimum standards of care and housing for dogs, cats, primates, rabbits, hamsters and _________________ in the premises of animal dealers and laboratories, and it requires identification of dogs and cats to prevent theft.

The 3R principles in animal research refer to ______________, ______________, and _______________.

The use of dogs and cats in research in the U.S. decreased from 1973 to 2016 from 195,157 to 60,979, and from 66,165 to 18,898, respectively.

A. 对
B. 错

The Institutional Animal Care and Use Committee (IACUC) plays no role in in ensuring the ethical and sensitive care and use of animals in research, teaching and testing.

A. 对
B. 错

Animal euthanasia is the same animal slaughter and pest control since in some cases the procedure is the same.

A. 对
B. 错

Proper use of animals, including the avoidance or minimization of discomfort, distress, and pain when consistent with sound scientific practices, is imperative. Unless the contrary is established, investigators should consider that procedures that cause pain or distress in human beings may cause pain or distress in other animals.

A. 对
B. 错

The development of knowledge necessary for the improvement of the health and well-being of humans as well as other animals requires in vivo experimentation with a wide variety of animal species.

A. 对
B. 错

Preference theory (Success theory) holds the notion that the level of welfare relates directly to having desires or preferences fulfilled. The welfare of an animal depends on the satisfaction of preferences - a more preferred environment results in a higher level of welfare.

A. 对
B. 错

Animalwelfareisthewell-beingofanimals.Thestandardsof"good"animalwelfarevaryconsiderablybetweendifferentcontexts. These standards are under constant review and are debated, created and revised by animal welfare groups, legislators, and academics worldwide.

A. 对
B. 错