⑴Did you buy some water?____          A、I live in Beijing.

⑵Where do you live?____                    B、Yes, It will.

⑶Who are they?____                            C、They are my grandparents.

⑷What's this?____                                D、No, we bought a watermelon.

⑸Will it be windy in Tianjin?____         E、It's a robot.

下面两图表来源于中国新闻出版研究院发布“第十三次全国国民阅读调查”。

图1：综合阅读率7年间变化趋势

图2：未成年人图书阅读率

下列等式：①$\sqrt{\frac{1}{16}}=\frac{1}{8}$，②$\sqrt[3]{{\left(-2\right)}^3}=-2$，③$\sqrt{{\left(-2\right)}^2}=2$，④$\sqrt[3]{-8}=-\sqrt[3]{8}$，⑤$\sqrt{16}=\pm 4$，

⑥$-\sqrt{4}=-2$； 正确的有（  ）