A:Hello,Jim!
B:Hi, I'm Jim.
(Ⅰ)求{an}的通项公式an;
(Ⅱ)若ak+1,a2k,a2k+3(k∈N*)恰好依次为等比数列{bn}的第一、第二、第三项,求数列{ nbn }的前n项和Tn.
下列有关台湾的叙述中,符合事实的是( )
The sports meeting was put off _______ the heavy rain.