复数${\left(\frac{1}{2}+\frac{\sqrt{3}}{2}i\right)}^3$（其中$i$为虚数单位）的值是（   ）

***在中共七届二中全会上的报告内容不包括

根据所给音标、汉语或首字母提示写出下列句中所缺单词。

Don't forget to____ /nɔk/ at the door before entering the meeting room. 

The new law is so strict that it doesn't____ / ə' lau/ any indoor smoking.

He got____ /drest/ quickly after taking a shower.

People throw l____  into the river and make it really dirty.

Nobody knew what to say and they just sat there in s____ .

The medicine should be taken t____  a day after meals.

When he grew up, he turned into an____ （诚实）and helpful person.

It's said that the terrible weather in this____ （季节）caused the ship accident.

A sweeping robot is____ （确切地）what I want for my house.

The fantastic world surely ____ （属于）to young people and the future.

见下图漫画《买一送一》。（图中顾客：难道买一个蛋糕是送一张卡片？！店主：是呀！）

店主的行为违背了经济活动应遵循的哪项原则？侵犯了消费者的哪项合法权益？