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瑞安某小学生Tim在文昌发射中心见证了天舟六号的成功发射，朋友Jack来电。
Jack: Hello, Tim. This is Jack.
Tim: Hi, Jack! I saw the launch(发射) of Tianzhou 6.
Jack: Really?
Tim: I’m very excited. It’s amazing!
Jack:
Tim: We took some soil from Rui’an and planted a tree in Wenchang. Then we visited the launch center.
Jack: Cool!
Tim: Yes, we did. We saw many special plants there.
Jack:
Tim:
Jack: See you then!
Tim: Bye!
| A．How do you feel? |
| B．Did you do anything else? |
| C．That sounds like a lot of fun! |
| D．What did you do these days? |
| E．We’re going back tomorrow afternoon. |
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
