Sales of Apple’s new iPhone 11 in China began on Friday, but were met with a cooler welcome from customers than in previous years. Unlike in previous years, no long lines were seen outside Chinese shops on Friday for the new iPhone, and the product release (发布) only made the headlines in a few media.

Huawei released its Mate 30 smartphone series on Thursday night. Its new devices(设备) have won consumers’ hearts at home and abroad. Many compared it with Apple’s new iPhone 11, saying that beats the new iPhone because of innovation and quality. One customer named Zhao Kai, an IT specialist who pre-ordered a Mate 30 Pro on Friday, said that he chose Mate 30 without hesitation. Zhao said, “It’s clear that Huawei’s new phone with its advanced 5G mode would lead the future global telecommunications market, too.”

In contrast with iPhone 11’s poor sales, Chinese netizens (网民) have joined in discussions on Mate 30 and iPhone 11. An online poll on the Mate 30 and iPhone 11 on Weibo on Friday showed that more than 60 percent of netizens chose the Mate 30, while less than 20 percent chose the iPhone 11. Many chose Huawei as a result of its technology.

Overseas customers also joined in the heated discussions on Huawei’s new flagship devices on sites. On Twitter, many netizens said “nice”, “best phone ever” and “my favorite one” on Huawei’s Twitter account. Some netizens in countries like the UK, the Netherlands and Argentina asked when Huawei’s new devices would be released in their countries.

Every kid has their own favorites. Dolls, dinosaurs, remote controls and cellphones — they might have a toy box with a wide range of play things to keep them entertained, but there's firm favorite they always reach for first-cars. Although the sex difference in the toy world remains, it's not only little boys who are drawn to all things with wheels. That my 20-month-old daughter dotes on the red bus toy is the proof of this.

From age 0 to 2, children are in the sensorimotor (感觉运动的) stage of development, explains Alyssa Wilkins. “They are learning by absorbing everything through their senses — sight, touch, taste, smell and hearing,” Wilkins says. “Toys and real-life objects like cars are very sensorily engaging. Kids can interact with toy cars, trucks, etc. through spinning (旋转) their wheels, watching them move in a variety of directions, or hearing the sounds they make.”

Plus, kids are just naturally drawn to loud and moving objects. “They see the lights on the cars and the rolling wheels, and hear the sound of the running engine. It's very engaging,” Wilkins says. “Kids will always be drawn to attractive and loud things because that is what engages their brain and sensory systems.”

Another appeal of toy vehicles is that they're typically small enough to fit in a child's hand Cars become the favorite of both boys and girls because they can put their cars in their pockets r carry them around. A car is also a cause-and-effect toy — it teaches children that their actions can make something happen. “It's super interesting and exciting for kids to learn that they can change something in their environment, and they may feel proud of what they have done,” Capanna-Hodge says.

Every child is unique in how they engage with toys, and the reasons for their play style may be diverse and complex. Ultimately, how your kids play with their toy vehicles could be a little window into what controls or excites them.

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As we age, our ability to think and remember stars to deteriorate. It is normal for old age to be associated with gradual decline in memory and brain mass. 【小题1】 Some of us have brains that age more slowly. Super-agers are people over the age of 80 who have the brain structures and abilities of much younger people. Eighty-seven-year-old Bill Gurolnick is such a super-ager.

Scientists know that parts of the brain decrease in size with age. But in super-agers that process is much slower. Emily Rogalski is a neuro-scientist at Northwestern University's Feinberg School of Medicine, in Chicago, Illinois. In a recent study, she showed that super-agers have young brains. The area of the brain responsible for attention and memory -- the cortex (脑皮层)— was shown to be thicker in super-agers.

"When we look at the cortex of their brain, we see that, on average, it looks more like a 50-year-old brain than it looks like an average 80-year-old brain."

【小题2】 These large brain cells appear to be involved with social-emotional communication. But their exact purpose is still a mystery. Scientists writing for Smithsonian magazine also call them spindle neurons (纺锤体神经元), and say they are "brain cells for socializing."

Several factors affect how our brains age. Scientists say super-agers have several things in common, including an active lifestyle. Many travel and play sports. They are often big readers. 【小题3】.

Super-agers also seem to have certain common personality traits. Rogalski says they are, for the most part, known for their optimism, resilience and perseverance. Growing old, she adds, does not have to be depressing and sad. "Perhaps, if we expected a bit better from ourselves, then we would understand that not all aging is doom and gloom."

【小题4】 That they are special and few. She says she wants to find out the reasons Gurolnick's mind is working so well and not aging as quickly as most.

Gurolnick's own father was diagnosed with Alzheimer's in his fifties Solving this mystery, Rogalski says, may help those who suffer from brain diseases such as Alzheimer's.

"We think if we can understand the factors contributing to super-aging, it may offer new hypotheses and new ways to explore the challenges in Alzheimer's disease."