如图，对右边“世界资本主义工业生产发展图”理解正确的是

①a处对应的历史时期，英国主要使用的工业能源是煤
②a处对应的历史时期，资本主义世界市场最终形成了
③b处对应的历史时期，电力作为新能源得到广泛的运用
④b处对应的历史时期，电话、电报等通讯工具发展迅速

Four Ways to Give Truly Meaningful Gifts

    Buying someone you love a gift that expresses your truest feelings isn't always easy. But when you get it right, the joy they show is worth it. ____

    Listen up.

    While you may think it's a great idea to surprise someone by giving them something you think is meaningful, it's best to get them exactly what they have told you. For example, you heard friends say they wanted the newest bike but you bought them a gym membership instead. ____ So get them what they've specially asked for.

    ____

    In the spirit of showing love, we might go big. However, we may not be thinking of what really makes the person happy. You might think buying your father the latest TV is perfect, but then when you get it home, it lights up the living room like a stadium and is totally wrong for the space. So think smart.

    Keep it open.

    Many of us may consider giving cash impersonal（没人情味的）. But this may save you some concern. The receiver can be allowed to choose whatever they want. In a recent survey of over 7,000 Black Friday shoppers, 39 percent said the receiver they were shopping for was “picky（挑剔）”. ____

    Create an experience.

    Visit websites where you can get the latest tickets for a play, buy a surf lesson, or even something unexpected like a flight lesson. ____ For example, if your kids are into NASCAR, just imagine the look on their faces when you score them a ride at a race car driving school. So give them a time that they will remember to heart.

    Zhang Ming, a college student from Shandong, created a 9-page “WeChat guide”. With drawings and simple words, the step-by-step guide explains how to send messages, take pictures and make video calls. Zhang made the guide for his parents. “My parents are getting old. They need an easy way to learn how to use new technology.” He said.

    Zhang's experience is common nowadays. Worldwide, 40 percent of parents learn about new technologies, including computers, mobile Internet and social media, from their children, according to a study from the International Communication Association in 2014.

    Parents used to teach their kids about almost everything. Now for the first time, the teachers become the students, and the students turn into the teachers.

    The change of roles comes from the rapid development of society and technology, says Zhou Xiaohong, a sociology professor from Nanjing University. Zhou said the Internet and other forms of media give children ways to get information besides from asking older generations(长辈). Therefore, in the age of information, it's possible that children know more than their parents do.

    According to the China Internet Network Information Center(CINIC), 56.7 percent of Internet users and 67.2 percent of social media users in China are under the age of 30. The younger generation usually acts as a link between their family and the new environment. But when they teach their parents new technologies, parents can connect to the new world by themselves, noted Zhou.

    In Zhang Ming's eyes, teaching his parents about WeChat brings him closer to his parents. “People can communicate more by using new technology. Why should we keep our parents out?” said Zhang.