睾丸下降
参考答案：指家畜等哺乳动物雄性个体在出生前后，睾丸从腹腔内经腹股沟管降入阴囊内的生理过程。
Water, _____ we cannot live, exists in the form of liquid, gas or solid.
A．from which
B．on which
C．without which
D．by which
人民法院一直未给辩护律师发送起诉书副本，这种做法正确吗
