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The world’s biggest library is in the US. It’s the Library of Congress (国会图书馆) in Washington D. C.
The library was started in 1800. Today, it has over 118 million items——books, maps, important old papers, films, DVDs, CD-ROMs and other things.
The library is a wonderful place for reading and studying. Every day many people go there. They can borrow books from the library. They can also read quietly in the library all day.
1．Where is the biggest library in the world?2．If (假如) you are in a library, what can you do in it?
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
