在污水汽提塔内,含硫污水与天然气是()接触,以脱除污水中的H2S。 ["逆向","同向","侧向","无一定方向"]
The purpose of the low pressure cut-out switch is to (). ["maintain liquid refrigerant at the suction of the compressor","maintain a preset suction pressure to the compressor","start and stop the compressor at preset operating pressures","operate at minimum efficiency"]
试指出如下所示集中标注的含义。
在污水脱硫装置中,在污水汽提塔内,从塔()进入的是含硫污水。 ["上部","下部","中部","侧面"]
许多基因中存在一些非编码区,称为内含子,下列对内含子描述正确的是() ["只存在真核生物中","通过RNA剪接机制去除","对生物来说没有任何功能","内含子不能被转录"]
简述会展项目财务管理的内容。