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Hello! My name is Helen. I am 8. I am a girl. My sister is 5. My brother is 10. I have 6 crayons, 5 pencils, 7 rubbers, 2 rulers, 1 pencil case and a nice schoolbag.
1．Helen is ________. ( )| A．eight | B．seven | C．five |
| A．ten | B．five | C．eight |
| A．six; five | B．five; six | C．three; six |
| A．nine | B．ten | C．seven |
| A．one | B．two | C．three |
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
