尿能
参考答案：
饲料被动物利用时从尿中排出的能量。
A student conducts an experiment in biology lab and discovers that the ratio of the number Of insects in a given population having characteristic X to the number of insects in the population not having characteristic X is 5:3, and that of the insects having characteristic X are male insects. What proportion of the total insect population are male insects having the characteristic X ？（）
A.A
B.B
C.C
D.D
E.E
大肠杆菌和枯草杆菌哪个耐高温？为什么？
of the insects having characteristic X are male insects. What proportion of the total insect population are male insects having the characteristic X ？（）