【单选题】在碘化钾的无色溶液中通入足量的氯气,再加入四氯化碳,则四氯化碳层的颜色为
【简答题】二氧化氯(ClO 2 )是目前国际上公认的第四代高效、无毒的消毒剂,是一种黄绿色的气体,易溶于水。 Ⅰ.(1)ClO 2 可由KClO 3 在H 2 SO 4 存在的条件下与Na 2 SO 3 反应制得。则该反应的氧化产物与还原产物的物质的量之比是________。 Ⅱ.实验室也可用NH 4 Cl、盐酸、NaClO 2 (亚氯酸钠)为原料制备ClO 2 ,其流程如下: (2)写出电解时发生反应的化...
【简答题】A.secondary B.critical C.minor D.remarkable
【简答题】A.great B.huge C.setbacks D.remarkable
【简答题】.(16分)二氧化氯(ClO 2 )是目前国际上公认的第四代高效、无毒的广谱消毒剂,是一种黄绿色的气体,易 溶于水 。 Ⅰ.(1)ClO 2 可由KClO 3 在H 2 SO 4 存在的条件下与Na 2 SO 3 反应制得。则该反应的氧化产物与还原产物的物质的量之比是____。 Ⅱ.实验室也可用NH 4 Cl、盐酸、NaClO 2 (亚氯酸钠)为原料制备ClO 2 的流程如下: (2)写出电解时发...
【单选题】根据WHIO规定的噪音标准,白天病区较理想的噪音强度是
【单选题】No less remarkable than the invention of nuclear power has been the way the technology has prompted governments to reevaluate the nature of international relations.
A.
No less remarkable than the invention of nuclear power
B.
What was as remarkable as the invention of nuclear power
C.
Inventing nuclear power has been none the less remarkable than
D.
The invention of nuclear power has been no less remarkable as
E.
The thing that was as remarkable as inventing nuclear power
【单选题】根据规定的噪音标准,白天病区较理想的噪音强度是