题目内容
（请给出正确答案）
A、Forensic chemists
B、Agricultural chemists
C、Environmental chemists
D、Food chemists
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（由简答题聘请的专业题库老师提供的解答）
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更多“_____ capture and analyze the physical evidence left behind at a crime scene to help deter”相关的问题
“We’re trying t o help people not spend time on yard work，”said Steven Waelbers, the designer of t he robot. “We want people to enjoy t heir free time with their family.”The electric robot can run by itself in right directions with the help of two beacons(信号塔) that must be placed in the yard. the robot includes a camera and ultrasound sensor (超声传感器) that Waelbers said would stop quickly when it finds pets and people.
Owners of the robot will need t o regulate t he values stored in the robot. then it will confirm the task it’s going to take. Before the robot operate by itself, an owner must manually wheel it around the yard 一 taking it around any obstacles like trees, bushes or mailboxes. By doing this, the robot is taught how long and wide the lawn is, and won’t accidentally(不小心) destroy your rose hush or run to the neighborhood.
Once this setup is complete, and the $3,999 robot has been trained on where to cut grass, rake leaves and shovel snow, it operates without any supervision.
Waelbers has always loved to build robots and play with electronics. He started work on a high-tech company after his father asked him to make a robot that would shovel snow for him. Waelbers plans to start sales in early 2017.
26. This article mainly talks about()
A. a newly-designed robot
B. The founder of a company
C. problems with a new product
27. According to Steven Waelbers, the robot is designed to()
A. encourage people to do exercise
B. help people keep healthy and fit
C. make people enjoy family time
28.the robot would stop in front of pets and people thanks to()
A. the remote controller
B. the ultrasound sensor
C. the big and square yard
29. Which of the following steps should be done in the first place？()
A. An owner must wheel the robot around the yard by himself.
B. The robot learns and stores the length and width of the lawn.
C. The robot operates the task it’s going to take without supervision.
30. Which of the following about Waelbers is TRUE？()
A. He didn’t love building robots when he was a young boy.
B. His father asked him to make a robot that could play balls.
C. He is starting to sell this snow-shoveling robot in early 2017.
A、telephones
B、fertilizers
C、planes
D、cars
A、The study of how human societies and social structures are organized and understood.
B、The technology of using computers to process, analyze and understand images so as to identify targets and images of different patterns.
C、The study of populations and population changes and trends, using resources such as statistics of births, deaths and disease.
D、The study of a range of social and economic issues related to developing or low-income countries.
A、To study the atmosphere and how processes in the atmosphere determine Earth's weather and climate.
B、To study the composition, movement, organisms and processes of oceans.
C、To develop new sources of energy that will have minimal impact on climate.
D、To explore how and why substances combine or separate to form other substances, and how substances interact with energy.
A、Etiquette is all about building better relationships with your family, friends, co-workers, and other people in your life.
B、Good manners help us to improve our intelligence.
C、Politeness and consideration for others is like investing pennies and getting dollars back.
D、Good manners help everyone to develop self-esteem.
A、Walking into others office without knocking.
B、If you hear a rumor about someone in the workplace, do not pass it on.
C、When you are late, contact your colleagues as soon as you realize that you won't make it on time.
D、When speaking with someone, show you are truly engaged.
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