31. Mr. Dan looked cold because _____.

A. he felt lonely

B. he disliked little kids

C. nobody had hugged him D. he knew little about Norah

32. The underlined word “demeanor” in Paragraph 2 probably means _____.

A. words

B. body

C. thoughts

D. attitude

33. How did Tara know more about Mr. Dan?

A. From a news reporter. C. From a shop assistant.

B. From a stranger.

D. From his neighbor.

34. What can we learn from the story?

A. Giving makes a real difference. B. It is important to respect each other. C. We should not judge a person at first sight. D. Good things will happen if one keeps trying.

B

The STAR Eco Station is an environmental science museum, a wildlife rescue center, and a shelter for endangered and illegally-traded foreign animals confiscated（没收）by the U.S. Fish and Wildlife Service. It carries out the mission “Preservation through Education” by educating visitors about the preservation of the environment and the inter-dependence of all living things. Field trips

STAR Eco Station hosts field trips for schools and camps throughout Southern California. Each field trip lasts two hours, consisting of a one-hour gathering and a one-hour tour of the facility, with lessons associated with California State Science Standards.

Throughout the field trip, students learn about the latest developments in environmental protection and the ways in which wildlife interacts with various ecosystems. The students also receive an up-close and hands-on experience with our rescued foreign wildlife. The tour includes different environmental exhibits that showcase the ways students can help protect animals in the wild.

Field trips are offered on weekdays only, from 10 a.m.-12 p.m. or 12 p.m.-2 p.m. The rate is $6 per visitor, both child and adult, with a $120 minimum. We offer one free adult per 10 children for groups of 40 or more. Maximum capacity is 120 people per field trip.

[

Public tours

Guided tours of the STAR Eco Station introduce visitors to over two hundred rescued foreign wildlife. Each tour is led by an Eco Station staff member, and features fun animal facts, hands-on animal encounters, surprising rescue stories, environmental exhibits, and original approaches to going green. Visitors may only see the animals on a guided tour, for both your safety and the safety of our animals.

The guided tour lasts approximately 45-60 minutes. Visitors are served on a first-come, first-served basis. No reservations are required. However, tours may sell out. We suggest larger groups schedule a private tour. Note:

Our regular public tours times are subject to change without notice. Please call in advance for the most up-to-date information. HOURS Saturday and Sunday: 10a.m. – 4p.m. (last tour begins at 3p.m.) Our guided public tours start every hour on the hour. Eco Station is not open to the public on weekdays. You can book a private tour or

35. The STAR Eco Station aims to ________.

A. help research wildlife abroad shelters

C. raise awareness of wildlife protection unusual animals

36. What can students do during a field trip?

A. Make a speech on the environment. rescue.

C. Get to know why species get endangered. D. Learn how living things affect each other.

37. For a guided tour, visitors should know that _____.

A. large groups are served first C. its time could change

C

Love the way you walk

B. it is available on weekdays

B. Take part in foreign wildlife

D. provide a knowledge of

B. collect money for animal

D. booking is needed

Listen carefully to the footsteps in the family home, and you can probably work out who is walking about. The features most commonly used to identify people are faces, voices and fingerprints. But the way they walk is also a giveaway.

Researchers have used video cameras and computers to analyze people’s gaits, and are now quite good at it. But translating such knowledge into a practical identification system can be tricky. Cameras are often visible, are difficult to set up, require good lighting and may have their view blocked by other people. A team led by Dr. Ozanyan and Dr. Scully have been looking for a better way to recognize gait. Their answer: pressure-sensitive mats.

Such mats are nothing new. They have been part of security systems. But Ozanyan and Scully use a complicated version that can record the amount of pressure applied in different places as someone walks across it. These measurements form a pattern unique to the walker. The researchers turned to an artificial-intelligence system to recognize such patterns, and it seemed to work. In a study in 2018, they tested the system on a database of footsteps of 127 people. They found its error rate in identifying who was who was a mere 0.7%. And Scully says even without a database of footsteps to work with, the system can determine someone’s sex and, with reasonable accuracy, a subject’s age.

One application of the mat-based gait-recognition system might be in health care, particularly for the elderly. A mat placed in a nursing home or an old person’s own residence could monitor changes in an individual’s gait that indicates certain illnesses. That would provide early warning of someone being at greater risk of falling over.

Gait analysis might also be used as a security measure in the workplace, monitoring access to restricted areas, such as parts of military bases, server farms or laboratories dealing with dangerous materials.

Perhaps the most interesting use of the mats, though, would be in public places, such as airports. For that to work, the footsteps of those to be recognized would need to have been stored in a database, which would be harder to arrange than the collection of photographs and fingerprints that existing airport security systems rely on. Many aircrew or preregistered frequent flyers would welcome anything that speeded up one of the most tiresome parts of modern travel. 38. What is mainly talked about in Paragraph 2?