A
When we do the same movements with our bodies over and over again，we overuse some muscles.And the overuse can lead to strain(压力) and injury.Sometimes those problems can come from doing sports.But there is another cause of muscle problems：handheld technology devices.
Staring down at your phone or tablet for long periods of time puts great tension on your neck.Experts say this posture puts strain on the entire upper body.Muscle strain linked to handheld technology has become such a common condition that it now has a name：tech__neck．
Common symptoms of tech neck are neck pain，loss of feelings in your hands and fingers，headaches—both mild and severe—and poor posture.In the worst cases of tech neck，you can lose the strength of your hands and fingers.
You can take simple steps to improve tech neck.Take breaks from using your technology.Stand up and stretch your legs often.Also，give your eyes a break by closing them now and then throughout the day.Do neck exercises.Experts at the website Spine Universe recommend these three neck stretches.
1．Chin(下巴) Stretch
Move your chin towards your chest.Hold for 5 seconds.The stretch should be comfortable from your neck to the base of your skull.Repeat 10 times.
2．Side Lean
Lean your head to the right.Bring your ear close to the shoulder.Hold for 20 seconds.Bring your head back to the center，and then lean it to the left，again holding for 20 seconds.Repeat 3－5 times on each side.
3．SidetoSide Head Turning
Turn your chin towards your right shoulder.Hold for 20 seconds.Bring your head back to the center，and then turn it to the left，again holding for 20 seconds.Repeat 3－5 times on each side.
And if your tech neck symptoms get worse，see a health care professional.
【解题导语】 本文是一篇说明文，介绍了“科技颈”及其症状和危害，并给出了应对建议。
1．What does the underlined phrase “tech neck” in Paragraph 2 mean?
A．Neck pain caused by sports.
B．Cure for diseases by technology.
C．Protection against problems with certain devices.
D．Neck problems caused by technology devices.
D 解析：词义猜测题。根据第二段中的“Muscle strain linked to handheld technology has become such a common condition that it now has a name”可知，“tech neck”指的是与便携式科技设备有关的肌肉紧张，并且已经成为一种常见的疾病，同时结合该段首句中的“great tension on your neck”可知，选项D“科技设备造成的颈部问题”意思与之相近。所以选D。
2．What is Paragraph 3 mainly about?
A．The harm of tech neck.
B．The meaning of tech neck.
C．The treatment of tech neck.
D．The worst result of tech neck.
A 解析：段落大意题。根据第三段的内容，尤其是首句中的“Common symptoms of tech neck”和第二句中的“worst”以及“you can lose”可知，本段主要讲述的是“tech neck”的常见症状和危害，所以选A。
3．Which of the following shows one of the correct gestures of “Side Lean”？
B 解析：细节理解题。根据2.Side Lean部分的“Lean your head to the right...Bring your head back to the center，and then lean it to the left，again holding for 20 seconds.Repeat 3－5 times on each side.”可知，该部分叙述的动作是把头靠向肩膀，让耳朵贴近肩膀，故选项B所示的姿势正确。所以选B。
4．What do the first and third neck exercises have in common?
A．Shaking the head.
B．Touching the chest.
C．Moving the chin.
D．Turning in the same direction.
C 解析：推理判断题。根据第一个练习中的“Move your chin towards your chest.”和第三个练习中的“Turn your chin towards your right shoulder.”可知，这两套动作都涉及下巴的移动，所以选C。
