It is a special cross-country race. The competitors’ vehicles are made 【小题1】 fruits and vegetables like carrots, eggplants, grapefruits, pumpkins and oranges. They are the creations of pupils from the Shanghai World Foreign Language Primary School.

According to Chen You, the science class teacher, 【小题2】 (base) knowledge had been taught within 6 classes to students before they drew sketches and 【小题3】 (choose) vegetables to make a food car.

Although students were encouraged 【小题4】 (design) their cars together with parents, all the cars should be made in the class. After 【小题5】 (bring) piles of ingredients as well as tools the children began their innovation. Some cut the carrot slices to make them round, and some others assembled (组装) their car components together.

In addition to the 【小题6】 (compete), students are required to reflect on the 【小题7】 (difficulty) they encountered making their vehicles, 【小题8】 things they have learned from the activity and the improvements they think the course can make.

【小题9】 touched the teachers most was the unity and friendship among the children. For example, although the contest was fierce (激烈的), students felt 【小题10】 (excite) for the champion car as if they themselves had stood out, and when a girl’s car fell apart their friends comforted her and helped reassemble the car.

A Chinese company says it has created a new facial recognition system that can identify people even if they 【小题1】 (wear) masks. Engineers at Hanwang Technology Ltd. say their system is the first to be created to 【小题2】 (effective) identify people wearing face masks.

Hanwang is now selling two main 【小题3】 (kind) of products that use the new technology. One performs “single channel” recognition, which is designed to be used at the 【小题4】 (enter) to buildings. The other product is a “multi-channel” recognition system, which can identify individuals in 【小题5】 crowd of up to 30 people “within a second” by 【小题6】 (use) groups of surveillance (监控) cameras. When people wear a mask, the recognition rate can reach about 95%. And the system’s success rate for people not wearing a mask 【小题7】 (be) about 99. 5%.

【小题8】 was not immediately clear how Chinese citizens were reacting to the new technology. The Chinese government has already been using other surveillance tools in the fight against the new coronavirus (新冠肺炎). 【小题9】 some citizens have expressed opposition to such tools, many others seem to have accepted the methods as a way 【小题10】 (deal) with the current health emergency.

Imagine biting into a juicy burger that was produced without killing animals. Meat grown in a lab is turning that 【小题1】 (imagine) into a reality. Several companies are developing lab-grown beef, pork, poultry and seafood. And the field is attracting millions in funding.

If widely used. lab-grown meat, also 【小题2】 (call) clean meat, could reduce much of the cruel treatment of animals 【小题3】 are raised for food. It could also reduce the environmental costs of meat production 【小题4】 (great).

The meat 【小题5】 (produce) by first taking a muscle sample (样本) from an animal. Scientists collect stem cells from the sample and multiply (使繁殖) them to form more muscles. It’s said that one muscle sample from a cow can produce enough meat 【小题6】 (make) 80,000 hamburgers.

Many companies say they expect to have products for sale within the next few years. But clean meat will have to overcome 【小题7】 number of difficulties, such as reducing the cost and proving the safety 【小题8】 the meat before it appears on the market. The good news is that despite all these 【小题9】 (challenge), the clean meat companies are keeping trying. If they can succeed, clean meat could make our lifestyle 【小题10】 (green) and more ethical than before.