Thepoorcountriesareextremely_______tointernationaleconomicfluctuations
A、inclined设数列 {an} 的前 n 项和为 Sn，则 {an} 等差。
(1) S n4=n 2+2n, n=1,2,3
(2) S n4=n 2+ 2n +1,n=1,2,3
Hiswifehasbeen_______alotofpressureonhimtochangehisjob.
Successfullearningisnota(n)________activitybutconsistsoffourdistinctstagesinaspecificorder
In1991，whilet11eeconomiesofindustrializedcountriesmetaneconomic_____，theeconomiesofdevelopingcountriesweregrowingveryfast．
Thepoorcountriesareextremely_______tointernationaleconomicfluctuations
