Michael’s vacuum cleaner squealed loudly, shook violently, and _____. A: filled the air with dust B: dust filled the air C: dust was filled in the air D: dust was filled with the air

She is ______ the dressing table. A: dusted B: dust C: dusting D: to dust

To effectively control the respirable coal and silica dust exposure of mine workers, it is not necessary to identify the sources of dust generation and quantify the amount of dust liberated by these sources.

dust [dʌst]

Dust bowl means______.

remove the dust from

Continuous Miner dust control Methods include: dilute, suppress, redirect, or capture dust A: 正确 B: 错误

Dust consists of particles in the atmosphere that come from various sources such as . A: soil B: dust lifted by weather C: volcanic eruptions D: pollution

An enormous amount of dust in the atmosphere could lead to ______.

over of all dust generated during mining