— How much did the new watch your sister? — She 350 yuan for it.
A:cost; paid
B:spend; cost
C:pay; cost
D:take ; paid
看人物,填成语。
东施 愚公 塞翁 夸父 江郞
____才尽 ____效颦 ____逐日
____移山 ____失马,焉知非福
已知x∈(b,a)且x≠0,1x∈(1a,1b),则实数a,b满足( )