One group of female rats of 180.-200.g weight was ( ) to the experimental group, another group of females to the control group.
A.accumulated B.allocated C.addicted D.attached正确答案B
One group of female rats of 180.-200.g weight was ( ) to the experimental group, another group of females to the control group.
A.accumulated B.allocated C.addicted D.attached正确答案B