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Peter：Turn off the light, Frank. 1．
Frank：Oh, I usually do that. I was in a hurry just now.
Peter：I got it. I’ve just read a book which gives ideas about how we can protect the environment. 2．
Frank：Oh, I never do that. You see, I have very short hair. 3．
Peter：You should take your own bags when you go shopping.
Frank：That’s easy. 4．What else?
Peter：People should stop driving cars and start riding bikes.
Frank：No way! It takes me 45 minutes to get to school by bike.
Peter：But it’s good for the environment. 5．
Frank：And you live close to school.
| A．I will do that from now on. |
| B．For example, turn off the shower when washing your hair. |
| C．It saves electricity. |
| D．Is it good for our eyes? |
| E．I am sorry to hear that. |
| F．I like riding my bike as well. |
| G．What else does the book say? |
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
