【简答题】We were __________ __ __________ ( 惊讶的发现 )he killed his wife.(astonish)
【单选题】we were ______ at the news of her sudden death.
【判断题】电容器按有无极性分为电解电容和无极性电容
【单选题】质谱分析有十分广泛的应用,除了可以测定物质的相对分子量外,还用于_______。
【判断题】只要神经纤维在结构上完整无损, 就能保证神经冲动的传导
【单选题】质谱分析有十分广泛的应用,除了测定物质的相对分子量外,还用于