()是由《保险法》以列举方式直接规定的法定条款。
A.保证条款
B.特约条款
C.基本条款
D.附加条款
参考答案:C
The world’s population is growing ______, and there is ____ land and water for growing rice.
A.larger; less
B.larger; fewer
C.more; less
D.more; fewer
设{an}为等比数例,Tn=na1+(n-1)a2…+2an-1+an,已知T1=1,T2=4,
(1)求数列{an}的首项和公比;
(2)求数列{Tn}的通项公式.