A:had always been warned
B:were always being warned
C:are always warning
D:always warned
观察下列算式,用你所发现的规律得出22010的末位数字是( )21=2,22=4,23=8,24=16,25=32,26=64,27=128,28=256,….
读拼音,写汉字。
mǔ
zhōng
gěng
jí
liàn
保____
____心
____
____水
铁____
mù
háo
páo xiào
háo táo
shī hái
____色
____叫
设正数数列{an}的前n项之和是bn,数列{bn}前n项之积是cn,且bn+cn=1,则数列1an中最接近108的项是第____ 项.