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There are lots of places of interest to visit in Henan. One of the 1． famous places is the Red Flag Canal (红旗渠) in Linzhou which was 2． on the side of cliffs (悬崖) of the Taihang Mountains.
The area was very dry with low rainfall because of 3． geographical conditions (地理条件). The local people used to live a hard 4． because of the shortage of water. So they decided to dig a canal to change the situation. They planned to take water 5． the Zhang River to Linxian county. The Red Flag Canal was started to build in the 1960s. The whole project took ten 6． to complete. It was really hard work. People used 7． tools to dig the canal, completely by hand. Now it has 8． helped the local people by bringing water to them and serves as the lifeline for the county.
Nowadays, some parts of the Red Flag Canal are open to tourists. Every year thousands of students 9． the Red Flag Canal Museum. While they move along and cross over the canal, they will learn 10． the spirit of “Red Flag Canal” is and know how great the Chinese people are.
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
