【简答题】《水质挥发酚的测定蒸馏后4-氨基安替化林分光光度法》(GB/T7490-1987)适用于饮用水、地表水、地下水和工业废水中挥发酚的测定,当挥发酚浓度≤0.05mg.L,时,采用()法测定,浓度>0.5mg/L时,采用()方法测定。
【判断题】数字化营销下,包装设计会重点挖掘每个人内心的认同感。
【单选题】地表水、地下水和饮用水中挥发酚的测定宜采用( )测定。
【简答题】听录音,选出你听到的句子。 ( ) 1. A. How do you go to school? B. How do you go to the zoo? ( ) 2. A. Take the No. 12 bus. B. Take the No. 20 bus. ( ) 3. A. My home is near the post office. B. My home i...
【简答题】听问句选择正确的答语。 ( ) 1. A. She went to Nanjing. B. We went to the zoo. C. I flew a kite yesterday. ( ) 2. A. Yes, I did. B. No, I don't. C. Yes, I am. ( ) 3. A. We can go by bus. B. You are vis...
【简答题】Listen and choose. ( )1. A. She went to Nanjing. B. We went to the zoo. C. I flew a kite yesterday. ( )2. A. Yes, I did, B. No, I don't. C. Yes, I am. ( )3. A. We can go by bus. B. You are...
【单选题】工业废水和生活污水中挥发酚的测定宜采用( )测定。
【判断题】半导体、钢铁、塑料、电力作为通信设备制造的原材料,很大程度上决定了通信产业的成本高低。
【简答题】根据上下文的意思补全对话。在方框中选择恰当的句子填入题前括号内。 A. Go down. B. Which bus shall we take? C. You are welcome. D. Excuse me. E. How far is it from here? A: 1.____________ Where is Beijing Railway Station? B: 2.________...
【简答题】《水质挥发酚的测定蒸馏后4—氨基安替比林分光光度法》(GB/T7490—1987)适用于饮用水、地表水、地下水和工业废水中挥发酚的测定,当挥发酚浓度40.5mg/L时,采用()法测定;浓度>0.5mgrL时,采用()法测定。