3 . The hydrogen-powered drone(无人机)，called “Qingting” in Chinese pronounced the same as the Chinese word “dragonfly”,has completed the automatic inspection of the 500 kilovolt of Wangnan Line.

It is the first time that a fuel-cell drone powered by hydrogen has been used in the national electrical power system to carry out inspection programs, meaning that hydrogen energy equipment has been firstly applied into the inspection of power grid(网).

The inspection drone traditionally is powered by lithium batteries which can last 20-30 minutes on average.There exists a certain threat to inspection safety if the drone falls out of control due to its use of large-capacity lithium battery pack, which easily leads to burn and explode. Thus, the current urgent need of inspection work for power grid requires a new kind of drone with long battery life,continuous inspection,and high security.

It is introduced that, this year State Grid Wenzhou Power Supply Company,together with Jinling Carbon Energy Digital Intelligence Technology Laboratory, finally successfully invented the first hydrogen-powered drone after half a year’s exploration and perseverance. As an electric drone taking hydrogen fuel cell to generate the power and hydrogen,hydrogen does not burn in thefuel cell during the operation of “Qingting”. Instead,it can be transformed directly into electricity by combining hydrogen and oxygen through the action of platinum-carbon catalyst in a clean and carbon-free way, and the only product is water.

It is learned that it offers power autonomy of 2 hours, about four times that of the lithium battery drone. The life of hydrogen fuel cell is more than 2000 hours,about 20 times that of the lithium battery.The battery of hydrogen fuel cell contains no heavy metal pollutants, whose materials can be recycled after destruction. It is tested that the “Qingting”drone fails to burn or explode when it falls out of control,which performs better in safety.

The success of the initial inspection of the“Qingting”drone has filled the gap of the application of hydrogen fuel in the electric power drone. Next, the company will expand the multi-directional application of hydrogen drones in inspection for power grid by carrying different functional equipment to make breakthroughs in the technical barriers. Moreover, under the national policy of actively promoting the application of clean energy, accelerating the development of hydrogen fuel cells in the field of unmanned aviation vehicles(UAVs)is of significance.

5 . Tours come in many creative forms, such as guided walking tours, self-guided walking tours, coastal walks and bush walks.

Guided Walking Tours

Guided walking tours are an informative and fun way to deeply understand the area about a city’s history and the people there. You can take this kind of tour anytime and anywhere. Guided walking tours come with a guide with the knowledge and history of the area and they can help you with a lot of the history that happened in the area. Guided walking tours are better at showing sites in-depth.

Self-Guided Walking Tours

Self-guided tours are good if you wish to do things at your own pace. With self-guided tours, you usually have a brochure on the area that you follow and it will tell you about local people’s favorite landmarks. Self-guided tours are suitable for individuals or close friends. You can take them in any season you like.

Coastal Walking Tours

Coastal walks are ideal for those who enjoy breathtaking views. Coastal walks will often take you inland for part of your journey, only to rejoin the coastline at some other spectacular views mother nature has provided. Coastal walks are for all year round. I have done some great walks in winter and seen mother nature at her best, and the best part about doing tours during winter is that there are not very many people that will almost have the tour to themselves.

Bush Walking Tours

Bush walks, according to research, can help reduce depression and raise self-esteem. Bush walks can be a family activity with your dog throughout the year. Some bush walks may take more than one day. Whenever you want to take a bush walk, you should keep in mind that all bush walks should be researched thoroughly as you may need special equipment like waterproof trousers. At the very least you should let your family or friends know where you are going. This is useful if you get lost.

Hope you can find the most suitable tour for yourself.

6 . Family is the warmest place where members always help each other, especially in the most difficult times.

My husband and I went through tough times many years ago. However, we didn’t mention the difficulties to our children. The only thing they knew clearly was that we had to _______many things. But we didn’t want to _______ them with a problem about which they could do nothing.

Our situation wasn’t improving, and we knew that we would have to look for outside help. Just as we reached the point of _______, our community gave us an envelope that had been left in the committee’s offering box. The committee said, “In our community, there has been a way of assisting those who have financial difficulties. In order not to make the receivers feel ashamed, money is secretly dropped into an offering box with only the_______name on each envelope. Then the envelopes are_______to those members without them knowing the givers’ names.”

You could imagine how overjoyed we were to receive it, which was enough to bring us through the desperate time. We couldn’t help but _______ who had given such a generous gift. We were enormously grateful.

Later, our son applied for a student loan so that he could attend university. It was then that we _______his saving account was almost empty. We’d trusted him to put the wages from his part-time job into the bank. We were so_______ that I asked him repeatedly to find out where the money had gone. He just stood there with firm eyes but said nothing.

Finally, with great _______,my son eventually admitted that the year before he had put his savings in the offering box for us. I stood there speechless, tears filling my eyes. He had spent several years saving that money and had given it to us __________without telling us what he had done.

Oil dominates every aspect    1    our life. It fuels our cars, and it is used in production of our plastic goods and the electricity for our homes and factories. Moreover, it can even    2    (find) in the fertilizer for the soil in which our food grows. Oil makes nations     3     (extreme) wealthy, while shortages of oil can bring economies to their knees. In short, this black and sticky substance has been running    4    (we) world.

Last year, I baked biscuits for complete strangers to say “thank you”. I’d had to call 999 because I found my husband unconscious on the floor. Within minutes, a police car arrived and soon my husband received medical care in hospital.

A week later, when I dropped off still-warm biscuits and presented a thank-you note at the police station, the policemen thanked me for delivering gifts.

I drove away feeling light and happy. Later, I realized that my natural high might have been more than it seemed.Research has shown that sharing gratitude has positive effects on health. People who express gratitude will increase their happiness levels, lower their blood pressure and get better sleep.

What about people who receive gratitude?Research has confirmed that when people receive thanks, they experience positive emotions.“Those are happy surprises,”says Jo-Ann Tsang, a professor of psychology. When someone is thanked,he’s more likely to return the favor or pass kindness on, and his chances of being helpful again doubles, probably because he enjoys feeling socially valued.

The give-and-take of gratitude also deepens relationships. Studies show that when your loved ones regularly express gratitude,making you feel appreciated,you’re more likely to return appreciative feelings, which leads to more satisfactory in your relationships.

Nowadays,however,many people don’t express gratitude. Our modern lifestyle may be to blame. With commercial and social media, everything is speeding the younger generation to feel they’re the center of the world. If it’s all about them, why thank others?

Why not thank others? Just take a look at how many positive effects can saying “thank you”have on personal health—and the well-being of others.

If you aren’t particularly grateful, I strongly suggest you learn to be.People who are instructed to keep gratitude journals,in which they write down positive things that happen to them,cultivate gratitude over time.