亚慢性毒性试验对动物的要求是()。
A.成年动物
B.必须雌雄各半
C.大鼠100g左右,小鼠15g左右
D.仅使用单一性别
E.必须为啮齿类或非啮齿类
参考答案:C
利润是企业在一定会计期间的经营成果,包括营业利润、利润总额和( )。
A.其他业务利润
B.投资收益(或损失)
C.净利润
D.补贴收入
We are pleased to know that you have planned to come to the Autumn Guangzhou Fair. We wish to discuss with you some other important things if you could come ______ your earliest convenience.
A.by
B.on
C.in
D.at