Soon, every robotic dog will have its day!

Isn’t it nice to always have a lovely dog follow you around and respond when 【小题1】 (ask) to sit down or shake hands? What 【小题2】 the dog has some unique skills, such as standing on one leg while resting on a chunk of tofu without destroying it, or continuously making back flips(后空翻)? This would be even better.

In fact, a life-like quadrupedal (四只脚的) robotic dog 【小题3】 is developed by Chinese tech company Xiaomi Corp seems like that special one.

【小题4】 (weigh) 8.9 kilogram, about the size of a Doberman, CyberDog 2 is the latest push by Xiaomi to popularize quadrupedal robotics. With a black, shiny, futuristic design, CyberDog 2 can run along at speeds of 3.2 meters per second, analyze its surroundings in real-time, create navigational maps, plot its destination, 【小题5】 avoid obstacles (障碍物).

“Coupled with human posture and face 【小题6】 (recognize) tracking, CyberDog is capable of following its owner and avoiding obstacles,“ said Lei Jun, CEO of Xiaomi.

“This is the first time I 【小题7】 (see) a robotic dog in reality. It is quite cool!” said Zhang Lu, 【小题8】 university student in Wuhan, Hubei province, after witnessing CyberDog 2 during an exhibition earlier this month. “I have seen videos of people walking robotic dogs online. But it is 【小题9】 (interesting) in reality,” Zhang said, adding that domestic technology products have changed and developed rapidly.

On being asked 【小题10】 the robot dog can help deliver parcels, an employee at Xiaomi said as long as the weight of the package is within the acceptable range of the flat back area of the robotic dog, it can be done.

The compass, gunpowder, papermaking, and printing are the “Four Great Inventions” of ancient China which are celebrated in Chinese culture for their historic 【小题1】 (significant). As early as the Tang Dynasty (618-907), the Chinese 【小题2】 (invent) block printing. In block printing, characters are carved out to make a wood-block printing plate. It is then used to print text. Diamond Sutra, an ancient Buddhist text 【小题3】 (print) in the year of 868 and discovered at Dunhuang Cave in 1900, is the 【小题4】 (old) printed book in the world.

Block printing is a 【小题5】 (cost) and time-consuming process, as each carved block can only be used for a specific page and 【小题6】 single mistake in carving could ruin the whole block. 【小题7】 (overcome) this, Bi Sheng (990-1051) invented movable-type print g during the Song Dynasty (960-1279). Individual characters are carved on identical pieces of fine clay, 【小题8】 are then hardened by fire. The pieces of movable type can then be glued to an iron plate and easily detached (分离). Each individual character can then be installed to print a page and then rearranged as it 【小题9】 (need). When the printing is finished, the pieces are put away 【小题10】 future use.

At present, working staff in many cities of China have resumed work in 【小题1】 orderly manner. Employees need to wear masks when they go to work. 【小题2】 (natural), there are concerns that masks might be insufficient（不足）.

Good news is that since last month, companies in Guangdong province, Beijing and Shanghai 【小题3】 (begin) to produce a new type of face mask, 【小题4】 uses a nanomaterial (纳米材料）membrane (薄膜) to filter bacteria, viruses 【小题5】 other pathogens, according to local health and medical products authorities.

The new masks are designed to meet the same 【小题6】 (standard) of N95, meaning they filter particles of all sizes with at least 95 percent 【小题7】 (efficient).

The masks are also easy 【小题8】 (breathe) through and are pretty comfortable. Besides, this new type of masks can 【小题9】 (reuse) up to 20 times depending on the user’s setting and wear time, the authorities said.

The retail price（零售价）for the masks 【小题10】 (create) by companies from Shanghai will be around 15 to 20 yuan each.