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A：Hello, Kangkang! This is Michael speaking.
B：Hello, Michael!
A：I’m worried. We’ll have a test tomorrow and I always get nervous before a test.
B：
A：But Kangkang, the test is a speech.
B：I will help you, Michael.
A：Kangkang, I feel more relaxed now because of your help.
B：My pleasure.
| A．Relax, Michael. |
| B．You are really a good friend. |
| C．Is there anything wrong? |
| D．I get so nervous when I give a speech. |
| E．I have a CD about speeches. |
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
