我10岁的小侄子来深圳过暑假，孩子很聪明，奥数、围棋、轮滑成绩都不错，学习成绩在全班排第一，英语口语也很棒。跟他聊天，他居然说他爸妈不配有他这么好的儿子。因为他爸妈没什么钱，只开得起十几万的日产车，同学都用iphone7，他只有儿童手机。

看完帖子，4名同学发表了一下看法，其中你认可的有（    ）

①叮当：“好优秀的男孩，以后要好好向他学习。”

②萌萌：“男孩虚荣心太重，不利于他健康成长。”

③青草：“男孩没有做到尊重、理解和感恩父母。”

④愤愤：“男孩有主见，敢于表达自我，给他点赞！”

MnO₂常用于实验室和电池工业，回答下列问题：

（1）MnO₂主要存在于软锰矿中．写出舍勒用软锰矿制取Cl₂的离子方程式____ ．

（2）检验溶液中Mn²⁺的方法为：向待测溶液中加入硝酸，无明显现象；继续加入难溶于水的NaBiO₃ （还原产物为Bi³⁺），溶液呈紫红色，写出反应的离子方程式____ 　．某生取实验室制备Cl₂后的冷却澄清溶液，依次加入硝酸、少量NaBiO₃，发现溶液变为紫红色后立即褪去，简述紫红色褪去的原因____ ．

（3）甲、乙分别为工业制备电解锰和电解MnO₂的原理图．

①甲池中阳极放出的气体是____ ．

②要配制乙池的电解质溶液250mL，需要称取MnSO_{4____} g．

③写出乙池中反应的化学方程式____ ．

（4）丙所示电解池，通电后阴极和阳极上分别得到单质Mn和MnO₂．

①写出丙池电解总反应的离子方程式　____ ．

②与甲、乙比较，丙的突出优点是____ ．

（5）上述方法制备的MnO₂常用于制造电池．写出碱性锌锰电池放电时的总反应式____ 　．

    Welcome to the town's greatest attraction --- Adam Square!

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    Adam Square is right in the center of the town. It's on Adam Street. It's next to the WalMart Supermarket and across from the bank. There are lots of restaurants and coffee shops there.

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    You can walk around the shops or you can have a cup of coffee. Try one of the popular coffee shops such as Domino. For a good meal, go to Pate's Pizzeria. It's really good and not too expensive.

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    Why not visit Prince's Park? It's a good place for children. Take a number 32 bus to Market Square: you can buy fruit and vegetables there. If you like historic buildings, visit the Church of St. Nicholas.

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    Come to Adam Square by bike. And it's OK to come here on foot. But you can't drive in Adam Square because there're no places for parking. Or if you're rich, you can take a taxi.

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    It's a little far from the airport. It's about 40 minutes' walk. You can get here by bike in 20 minutes. But it will only take you 10 minutes to be here in a taxi

Peter is ten years old. He is _______ to go to school.