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Mary and Sally are good friends. They are English girls. They speak(讲) English. Mary is eleven years old. She can sing. Sally is twelve. She can’t sing, but she can dance. On Sundays, they play with their friends. They play different (不同) games. Some play football, some like riding bikes, some like singing and dancing and some do puzzles. They are very happy.
1．Mary and Sally are __________. ( )| A．sister | B．brother | C．friends |
| A．13; 12 | B．11; 12 | C．12; 12 |
| A．dance; sing | B．sing; dance | C．dance; dance |
| A．on Saturday | B．on Sunday | C．on Saturday and Sunday |
| A．speaking English | B．singing and dancing | C．playing basketball |
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
