Since last year, city streets around China have seen colorful shared bikes, which people can rent with a smart phone app and then park wherever they choose. To reduce traffic jams and air pollution, many cities have offered bike-sharing. But sometimes, dreams can turn sour.

    As shared bikes become more popular, problems keep showing up. According to news reports, shared bikes are badly treated by users. When people are using the bike, some of them just throw it onto streets and even into ditches (水沟). Some bikes are stolen. Recently, a man in Shanghai was fined (罚款) 1,000 yuan for stealing a shared bike.

    Besides, the damage (破坏) to the QR codes on the bikes has brought huge losses to bike-sharing companies, like Mobike. If the QR code is damaged, the bike cannot be used any more. It can take several hundred yuan for the company workers to find a lost bike and get it repaired.

    Mobike has 100 credit (信用) scores for each user. Penalty (惩罚) points will be taken in case of users' bad behaviors. Once the score drops to below 80, bike rental will go up to five yuan per 30 minutes.

    However, punishment may not be the best way to stop shared bikes from being stolen or damaged. Bike-sharing services will work well only if people follow the rules and show respect for the bikes and other users.

1990年4月18日，党中央、国务院决定开发开放上海浦东，在我国改革开放的大背景下，浦东的历史自此掀开新的一页。关于浦东的开放说法错误的是（    ）

假如你是一位企业家，在开发海水资源的众多项目中，选择了海水提镁，在前期考察过程中你将遇到许多问题，请根据背景材料的提示，按要求回答相关问题：

材料1：下图为海水中各元素含量情况(mg/L)

材料2：部分化学试剂的市场价格

请回答下列问题：

如图中两条经纬线之间的间距相等，读图回答下列问题。