实验动物如何进行分类？
参考答案：
主要按遗传学控制和微生物控制来分类。
—It’s very important us to make a plan before a new term.
—Yes. You must try to make it carefully.
A. of B. for C. to
高血压危象是收缩压可高达
A．180mmHg
B．200mmHg
C．220mmHg
D．240mmHg
E．260mmHg
