【单选题】KMnO 4 标准溶液配制时,正确的是( )
A.
将溶液加热煮沸,冷却后用砂芯漏斗过滤后,存于棕色试剂瓶中。
B.
将溶液加热煮沸 1 小时,放置数日,用砂芯漏斗过滤后存于无色试剂瓶中。
C.
将溶液加热煮沸 1 小时,放置数日,用砂芯漏斗过滤后存于棕色试剂瓶中。
D.
将溶液加热,待完全溶解,放置数日,存于棕色试剂瓶中。
【单选题】The sentence I wish I had been more careful in spending money express the speaker's ( ).
【单选题】解决车削细长轴过程中工件受热伸长引起的问题,应采取( )
【单选题】KmnO4标准溶液配制时,正确的是( )。
A.
将溶液加热煮沸,冷却后用砂芯漏斗过滤贮于棕色试剂瓶中
B.
将溶液加热煮沸1h,放置数日,用砂芯漏斗过滤贮于无色试剂瓶中
C.
将溶液加热煮沸Ih,放置数日,用砂心漏斗过滤贮于棕色1剂瓶中
D.
将溶液加热,待完全溶解,放置数日,贮于棕色试剂瓶中
【单选题】The sentence I wish I had been more careful in spending money expresses the speaker's_____.
【单选题】KmnO 4 标准溶液配制时,正确的是()。
A.
将溶液加热煮沸,冷却后用砂芯漏斗过滤贮于棕色试剂瓶中
B.
将溶液加热煮沸1h,放置数日,用砂芯漏斗过滤贮于无色试剂瓶中
C.
将溶液加热煮沸1h,放置数日,用砂心漏斗过滤贮于棕色1剂瓶中
D.
将溶液加热,待完全溶解,放置数日,贮于棕色试剂瓶中
【单选题】The sentence I wish I had been more careful in spending money expresses teh speaker's .
【单选题】The sentence I wish I had been more careful in spending money expresses the speaker’s ___.(2016)
【单选题】KMnO 4 标准溶液配制时 , 正确的是( )
A.
将溶液加热煮沸,冷却后用砂心漏斗过滤贮于棕色试剂瓶中
B.
将溶液加热煮沸1小时,放置数日,用砂心漏斗过滤贮于无色试剂瓶中
C.
将溶液加热煮沸1小时 , 放置数日 , 用砂心漏斗过滤贮于棕色试剂瓶中
D.
将溶液加热 , 待完全溶解 , 放置数日 , 贮于棕色试剂瓶中
【单选题】KMnO4标准溶液配制时,正确的是 ( )
A.
将溶液加热煮沸,冷却后用砂心、漏斗过滤贮存于棕色试剂瓶中
B.
将溶液加热煮沸1h,放置数日,用砂心、;漏斗过滤贮存于无色试剂瓶中
C.
将溶液加热煮沸1h,放置数日,用砂心、;漏斗过滤贮存于棕色试剂瓶中
D.
将溶液加热,带完全溶解,放置数日,贮存于棕色试剂瓶中