A:山坡地区
B:气候湿热,人们过着聚居生活
C:气候严寒
D:热带干旱,人们过着游牧生活
____ ____ ____, there was a king.
Dear Jenny,
Now we are in the hospital of our city . My mother and I have a bad cold . We sees many children here . Some people have a cold. Some people have a headache. Some people have a fever. They a re waiting outside the doctor's room .Now it's our turn.
Yours,
Jack
The leg this desk is broken(坏的).
已知等差数列an的前n项和为Sn,a5=5,S5=15,则数列1anan-1的前100项和为 ( )