下列哪种行为属于动物的学习行为 [ ]
A.刚出生的小袋鼠爬到母袋鼠的育儿袋中吃奶
B.小鸟在池边喂鱼
C.蜜蜂筑巢
D.小鸡绕道取食
D
Tom ______ some carrots for lunch. [ ]
A. can has
B. can have
C. is has
D. does have
最常见的继发性高血压是
A.肾血管性高血压B.原发性醛固酮增多症C.肾实质性高血压D.皮质醇增多症E.嗜铬细胞瘤