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Tom: Hi! Good afternoon, Amy.
Amy: Good afternoon, Tom .This is my new friend, Lulu.
Tom: Welcome to our school. Nice to meet you, Lulu.
Lulu: Thank you! Nice to meet you, too.
Tom: Where are you from?
Lulu. I am from Sydney(/悉尼). What class are you in?
Tom: I am in Class Four. Are you in Class Four, too?
Lulu: Yes. I am.
1．Tom and Lulu are in the same class. （______）
2．Amy is from Sydney. （______）
3．Amy, Tom and Lulu are students. （______）
4．Amy is new here. （______）
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
