填空题 If you wipe a finger across a household surface that hasn"t been cleaned in the last few days, chances are you"ll 1 with dust. Look around and you"ll find the stuff everywhere, from the particles 2 in the sunlight to the fine 3 of dirt coating TV screens, bookshelves, and car dashboards. Dust comes from everything and, like death and taxes, you can"t avoid it. When things—shoes, rocks, plants, socks, anything at all—begin to 4 , they release tiny pieces of themselves into the air. These 5 bits settle everywhere, and because matter is always coming apart, dust production is a never-ending business.
In a typical household, dust 6 mainly of things such as dead insect parts, sheets of skin, food particles, and pieces of fabric. But not all dust is the product of natural 7 ; we create amazing quantities of dust everyday. For example, a single puff (吸) of a cigarette contains an estimated four billion large dust particles. Industry of all sorts, from the 8 of a piece of wood to large-scale steel manufacturing, creates particular kinds of dust. In short, dust is all around, even in the air we breathe. Because its particles are so small, dust is highly 9 . Westward winds regularly blow dust from the Sahara desert across the Atlantic and into the 10 above American coastal towns, where it contributes to some thrilling sunsets.