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Mary: Hi, Jim! What’s in your hand?
Jim: My smart phone.
Mary: Wow! It’s nice! What can you do with your phone?
Jim: I can do a lot of things. I often use it to read newspapers, take photos and make phone calls.
Mary: Do you play games?
Jim: No, it’s not good for our eyes.
Mary: Your are right.
1．There is a phone in Mary’s hand.
2．Jim often uses the phone to see films.
3．Jim can make phone calls.
4．Mary often play games with mobile phone.
5．Playing games is not good for eyes.
同类型试题
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
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
