Activated carbon was produced from olive stones(OSAC) by a physical process in two steps. The adsorption character of this activated carbon was tested on three
动名词,由动词原形 ing构成,具有双重性,既有动词的某些特征和各种变化形式,又有名词的某些性质。在句中充当主语、宾语、表语或定语,同时也能被副词修饰或者支配宾语。 ■ 1. 作主语 1)直接作为主语。例如: Taking exercise every day is a good habit. 2)用 it 作形式主语。例如: It isn’t easy trying to clim
Using data obtained with a full-scale sewage sludge composting facility, this paper studied the effects of ambient air temperature on the composting temperature