用数学归纳法证明不等式$1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2^n-1}<n$($n\in N^{*}$,且n>1)时，不等式在n=k+1时的形式是（   ）

下列史实符合西周确立的宗法制继承原则的是：（   ）

根据上面内容判断正误，正确的写（T），错误的写（F）.
     There are many clubs in our school. Let me tell you what they are.
     Do you like playing tennis? It's OK if you can't play tennis. Mr. Qing can teach you. Come and join the tennis club!
Do you like acting? Do you like to work with other young people? Do you want to be in the school play? Come and join the acting club.
Can you dance? Do you like Latin (拉丁) dance or Chinese traditional (传统的) dance? Join the dance club and dance for the Christmas (圣诞节) show.
    Do you like French food? Can you speak French? Do you want to learn French? Join the French club now.
____ Mr. Qing can teach you French.
____ If you join the acting club, you can act in the school play.
____ Christmas Day is coming.
____ You can learn French in the French club.
____ There are three clubs in the school.