伏安计是由伏特表和安培表组成的.A voltammeter is consisted of a voltmeter and an ammeter.此外, 该电阻器还限制回馈安培表的交流增益.Also, the resistor limits the AC gain of the feedback ammeter.最基本的仪器包括安培表, 电压表和电阻表.The most basic instruments include an amme...
Nitrates are chemicals that occur naturally in water and the soil.硝酸盐是水和土壤中自然存在的化学物质。Nitrates leach from the soil into rivers.硝酸盐由土壤渗入江河。Nitrates are used as preservatives in food manufacture...硝酸盐在食品加工业中被用作防腐剂。Springs a...