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A.Why are you so happy?
B.Don’t be sad.
C.He is too tired.
D.Great! I am so excited.
E.So do I.
1．—Nice to see you!
—Nice to see you, too. Our classroom is new and big!
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2．—Why do you look so upset?
—Because my new toy is missing.
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3．—Where is Baobao?
—He is in bed.
4．—
—Because my dad buys me a pet. It’s a baby dog.
5．—I like our new books.
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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
