【C2】A．sourcesB．abundanceC．shortageD．reduction

【B10】A．faultB．mistakeC．errorD．shortage

A．shorthandB．short－waveC．shortcomingD．shortage

【C3】A．needB．wantC．absenceD．shortage

【C8】A．abductionB．deductionC．conductionD．reductions

A functional decline is ______.A．the reduction in

动物实验中要求坚持的“3R”原则不包括（)A：Reduction（减少)B：Require（需要)