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| A． Helen Keller was a blind and deaf girl. She couldn't see or hear. She had a teacher, Anne Sullivan. Anne was a nice teacher. She took Helen out of her room and taught her to live like other people. Helen learned a lot of things. She swam in rivers, rode horses and even climbed trees. Helen loved her teacher very much.  1 ____ Helen Keller could hear birds singing. 2 ____ Anne Sullivan was Helen's mother. 3 ____ Helen couldn't see, but she could swim in rivers and climb trees. 4 ____ Miss Sullivan asked Helen to stay at home because she was blind. 5 ____ Helen couldn't hear, but she could ride horses. 6 ____ Helen swam in rivers, flew kites and climbed trees. |
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
