对家鸽的分类等级说法错误的是 [ ]
A．鸟类
B．脊椎动物
C．空中飞行的动物
D．哺乳类
答案：D
I would appreciate _____, to be frank, if goods could be delivered as soon as possible. [ ]
A. you
B. this
C. it
D. myself
下列描述哪个正确()
A．二侧肾脏位置在同一水平
B．右肾略高于左肾
C．右肾略低于左肾
D．右肾常位于胆囊内下方
E．以上均不是
