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【简答题】
水样采集和保存的主要原则是有代表性和避免水样受到任何可能引入的污染。 请填写一下表格。 监测项目 盛水容器 保存方法 保存期 采样量 /mL COD cr G 2d 500 DO 24h 250 BOD 5 溶解氧瓶 低温( 1 ~ 5 °C) 12 h 250 氨氮 24h 250 总氮 G 、 P 加入浓硝酸酸化至 pH < 2 7d 250 总氰化物 G 、 P 24h 250 总铬 G 、 P 加入浓硝酸酸化至 pH < 2 14d 250 油类 G 加入浓 HCl 酸化至 7d 500 微生物 灭菌容器 加入硫代硫酸钠至 0.2 ~ 0.5g/L 除去残余物, 4 °C保存 尽快 参考 HJ493-2009 及各指标的测定方法标准
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参考答案：
举一反三
【单选题】标准型的利率互换是指(
A.
浮动利率换浮动利率
B.
固定利率换固定利率
C.
固定利率换浮动利率
D.
本金递增型互换
查看完整题目与答案
【单选题】标准型的利率互换是指（ ）。
A.
浮动利率换浮动利率
B.
固定利率换固定利率
C.
固定利率换浮动利率
D.
远期利率换近期利率
查看完整题目与答案
【多选题】谷歌眼镜的缺陷主要有:
A.
价格高
B.
独立性不强
C.
存在安全隐患
D.
侵犯隐私的嫌疑
查看完整题目与答案
【简答题】B. Fill in each blank with a given word or expression in their right form. actually , pack up, otherwis, e remove from, perfect, along with, intend, do with 1. He _______ his things and went on a ...
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【单选题】智能深松机( )少,节约整地( )。
A.
油耗、成本
B.
油耗、效率
C.
效率、成本
D.
故障、成本
查看完整题目与答案
【简答题】阅读理解。 One day, Jack and David went fishing. Jick took Tony with him on the river, when the dog saw a bird, he wanted to run after it and tried to catch it. 'All the fish are frightened and swim away,'...
查看完整题目与答案
【单选题】— John went to the hospital alone. — If he ________ me about it, I would have gone with him. [     ]
A.
should tell
B.
tells
C.
told
D.
had told
查看完整题目与答案
【判断题】BOM 机方卡传输单元与 TVM 方卡传送单元的主控板在硬件上是一致的。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Der neue Walkman ist nach zwei Stunden plötzlich stehen____• Hoffentlich kann ich ihn noch umtauschen.
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【单选题】听力原文：M: As far as I'm able to judge, now these people are simply crazy. W: Well, I should say that it is a shame that the fans went too far and won themselves a bad name all over the world. But it see...
A.
It's a shame to scold the fans' behaviors.
B.
Fans are mad and should be scolded severely.
C.
The fans are solely responsible for their behaviors.
D.
We shouldn't only blame the fans for their behaviors.
查看完整题目与答案
相关题目：
【单选题】标准型的利率互换是指(
A.
浮动利率换浮动利率
B.
固定利率换固定利率
C.
固定利率换浮动利率
D.
本金递增型互换
查看完整题目与答案
【单选题】标准型的利率互换是指（ ）。
A.
浮动利率换浮动利率
B.
固定利率换固定利率
C.
固定利率换浮动利率
D.
远期利率换近期利率
查看完整题目与答案
【多选题】谷歌眼镜的缺陷主要有:
A.
价格高
B.
独立性不强
C.
存在安全隐患
D.
侵犯隐私的嫌疑
查看完整题目与答案
【简答题】B. Fill in each blank with a given word or expression in their right form. actually , pack up, otherwis, e remove from, perfect, along with, intend, do with 1. He _______ his things and went on a ...
查看完整题目与答案
【单选题】智能深松机( )少,节约整地( )。
A.
油耗、成本
B.
油耗、效率
C.
效率、成本
D.
故障、成本
查看完整题目与答案
【简答题】阅读理解。 One day, Jack and David went fishing. Jick took Tony with him on the river, when the dog saw a bird, he wanted to run after it and tried to catch it. 'All the fish are frightened and swim away,'...
查看完整题目与答案
【单选题】— John went to the hospital alone. — If he ________ me about it, I would have gone with him. [     ]
A.
should tell
B.
tells
C.
told
D.
had told
查看完整题目与答案
【判断题】BOM 机方卡传输单元与 TVM 方卡传送单元的主控板在硬件上是一致的。
A.
正确
B.
错误
查看完整题目与答案
【简答题】Der neue Walkman ist nach zwei Stunden plötzlich stehen____• Hoffentlich kann ich ihn noch umtauschen.
查看完整题目与答案
【单选题】听力原文：M: As far as I'm able to judge, now these people are simply crazy. W: Well, I should say that it is a shame that the fans went too far and won themselves a bad name all over the world. But it see...
A.
It's a shame to scold the fans' behaviors.
B.
Fans are mad and should be scolded severely.
C.
The fans are solely responsible for their behaviors.
D.
We shouldn't only blame the fans for their behaviors.
查看完整题目与答案
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