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Daming has got two letters today. One is from his friend, Sam in the UK and the other is from his cousin, Bill in the US. Sam went to a children’s theatre with his family last week. The show was funny. They laughed a lot. After that, they ate hamburgers and chips. Bill stayed at home and read books about Chinese history. He asked Daming to send him some CDs about China.
1．Daming has got three letters today. （2．Sam is in the US. （
3．Sam went to a children’s theatre last week. （
4．Bill read books about Chinese history. （
5．Bill asked Daming to send him some books about Chinese history. （
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
