题型:语法填空(语篇) 题类: 难易度:困难
河北省保定市保定名校协作体2024届高三下学期三模英语试题
90 percent of the world's fireworks are produced in China. The biggest importer is the US, which (ship) in more than US $650 million worth in 2021.
The details of fireworks' invention are lost to history, but folk tale tries to fill in the gap. It goes that monk named Li Tian created fireworks around 1400 years ago by packing gunpowder into bamboo tubes (scare) off evil spirits.
An explosive mixture of gun-powder and chemical compounds (化合物) is makes fireworks flash in pretty colours and fun shapes. The images they make depend on the placement of these compounds inside the shell of the firework. Crowd (favorite) include "comet", featuring a long trail of sparks; "peony", a flower-like burst; and "strobe", which produces a blinking effect.
The single biggest firework shell ever shot was part of a 2020 winter-carnival display in Colorado, US. (weigh) 1268 kilograms, it rose more than a kilometre into the sky bursting, turning the night sky red.
For centuries we had to light firework hand, but since the 1980s, there's been another option: computer-controlled lighters, which made music at displays more (precise) timed and safer. An even greener alternative recently (adopt) is using drones to trace flashy patterns in the sky. The future of fireworks, like so much else, may be robotic.
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