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学进去-教育应平等而普惠
试题
类型:阅读单选
难度系数:0.65
所属科目:初中英语

Cellphones are keeping children and teenagers awake at night. Researchers made a study of children and teenagers aged 6 to 19. According to the study 72% of the children use their cellphones in their sleep environment. And they also have found a “strong connection” between the use of cellphones at bedtime and poor sleep.

One reason is not just that kids are sleeping too late with cellphones. Using them can also excite the children’s mind too much. The light from a smartphone influences how the body normally works and then leads to poor sleep. So many kids could be at risk.

Getting good sleep is very important for learning difficult subjects like math and foreign languages.

The American Academy of Pediatrics (AAP) suggests that kids should stop looking at cellphones at least half an hour before bedtime, because this helps their brains slow down and gets their bodies ready for sleep.

If you want to pick up a cellphones at bedtime, try the following activities instead:

•Keep a diary: Thoughts and worries can make you anxious at night. Writing thoughts on paper can clear your mind.

•Try a mind exercise: Close your eyes and count backward from 100 to 1.

•Just relax: Breathe in and out slowly and deeply. Sweet dreams!


Choose the right answer according to the passage.
1.According to the study, what is the percentage of the children who use their cellphones in their sleep environment?
A.27%B.6%C.72%D.19%

2.Why does AAP suggests that kids should stop looking at cellphones at least half an hour before bedtime?
A.Because this helps their brains slow down and gets their bodies ready for sleep.
B.Because it is harmful for their eyes.
C.Because they need sweet dreams.
D.Because thoughts and worries can make them awake.

3.What is the meaning of the underlined word “anxious”?
A.happyB.worriedC.relaxedD.surprised

4.If you want to pick up a cellphone at bedtime, try the following activities EXCEPT ________.
A.keeping a diaryB.trying a mind exercise
C.just relaxingD.listening to rock music

5.The passage is mainly about ________.
A.cellphones and sleepB.sweet dreams
C.the use of technologyD.the life of children and teenagers
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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