若a<b<c,则函数$f\left(x\right)=\left(x-a\right)\left(x-b\right)+\left(x-b\right)\left(x-c\right)+\left(x-c\right)\left(x-a\right)$的两个零点分别位于(  )

在一次讨论中，同学们就“各尽所能，发挥所长，奉献集体”纷纷发表了自己的看法。下列说法中正确的是（    ）

$\frac{2}{3}\times \frac{3}{4}$ ____ $\frac{3}{4}$

$\frac{8}{5}\times \frac{9}{8}$ ____ $\frac{9}{8}$

$\frac{5}{2}\times \frac{1}{2}$ ____ $\frac{1}{2}\times 1$

根据句意及首字母提示补全单词。
(1)Four people are in my f____ . They are my parents, my sister and I.
(2)Mr. Li wants to b____  a pair of pants in the clothes store.
(3)—Could you help me with my English?
—No p____ .    
(4)The boy is my uncle's son. He is my c____ .
(5)—How do you say 6:15 in English?
—It's a quarter p____  six.