【判断题】The link between colloid and surface follows from the fact that particulate matter has a high surface area to mass ratio.
【简答题】颗粒遗传(particulate inheritance)
【简答题】It is shown that there are usually________ levels of hazardous gases, particulate matter and other chemical nasties indoors than outside.
【判断题】在Windows7中可以打开多个窗口,但这些窗口中只可能有一个处于活动状态。
【简答题】PM 2.5 is a particulate matter with a mean aerodynamic diameter of 2.5 _______.
【单选题】下列不属于孝悌之义的典故是() 选择一项:
【判断题】车架是汽车的基础,车身和主要部件都焊接在车架上。
【单选题】车架是整个汽车的安装基础,对车架的要求是 ( )