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Li Ming: I have 13 pencils, 35 crayons and 8 rulers.
Steven: I have 21 pencils, 15 pens and 10 rulers.
Mary: I have 19 pencils, 40 crayons and 12 books.
Tom: I have 25 erasers, 72 crayons and 23 rulers.
1．How many pencils does Li Ming have? ( )
| A．Thirty. | B．Thirteen. | C．Three. |
| A．Twenty-one. | B．Twenty-four. | C．Twenty-three. |
| A．twenty | B．fiftyfour | C．forty |
| A．fifty-three | B．thirty-four | C．thirty-three |
| A．seventyfour | B．seventy-five | C．eighty-five |
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
