把Q=4×10^﹣9C的试探电荷放在电场中的A点，具有的电势能6×10^﹣8J，求

$\frac{3}{8}$ ____ $\frac{1}{3}=\frac{1}{24}$      $\frac{2}{7}$ ____ $\frac{1}{2}=\frac{11}{14}$                       $\frac{4}{9}$ ____ $\frac{1}{2}=\frac{17}{18}$

$\frac{5}{6}$ ____ $\frac{2}{3}=\frac{1}{6}$       $\frac{3}{4}$ ____ $\frac{1}{6}$ ____ $\frac{5}{8}=\frac{7}{24}$      1____ $\frac{4}{5}$ ____ $\frac{3}{10}=\frac{1}{2}$

①人参是我国东北的三大著名特产。

②我们的力量无比强壮。

Mice: There are many festivals in a year.

Mice: Yes. When's the Spring Festival?

Mice: ____

Peter: When's the Dragon Boat Festival?

Alice: ____

Peter: ____

Mice: It is usually in September or October.

Peter: ____

Mice: It usually comes in October, after twenty-five days of the Mid-autumn Festival.

Peter: Oh, I see.