用于强壮保健的要穴是（）
A.足三里
B.上巨虚
C.下巨虚
D.条口
E.丰隆
参考答案：A
My brother preferred to sleep at home rather than _______ for a picnic with his friends.
A．go
B．going
C．to go
D．gone
肾母细胞瘤的临床特点是（）
A.血尿
B.腰痛
C.腹部包块
D.高血压
E.发热
