用最大的七位数与最小的八位数相差______.
最大的七位数是:9999999,
最小的八位数是:10000000,
差:10000000-9999999=1.
故答案为:1.
—I would like to buy an expensive camera.
—Well.We have several models________.
A.to choose from
B.of choice
C.to be chosen
D.for choosing
属于膀胱结石的典型症状是
A.尿频、尿急
B.排尿中断
C.血尿
D.脓尿
E.尿潴留