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I live in Shenzhen, a big city by the sea. It is clean and beautiful. There are lots of buses and cars. People cook with natural gas (天然气) and have a lot of delicious food. There are many tall buildings in the city. Ping An mansion (平安大厦) is the tallest. I love my home city.
But more than 40 years ago, it was a very small town. There were only some small shops in the streets. There were some buses. People cooked with coal (煤炭). There were not any tall buildings. Most people were fishermen. Life was hard at that time.
| A. some buses B. cooked with coal C. many tall buildings D. lots of buses and cars E. cook with natural gas F. not any tall buildings | ||
| before | now | |
| city | small town | big city |
| building | ||
| cooking | ||
| transportation (交通) | ||
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
