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【单选题】
冷却器的密封,即是对冷却器进行()按技术要求对中间冷却试压,气室压力要求0.4Mpa。A.
检修
B.
检测
C.
试压
D.
加垫
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举一反三
【单选题】The most important ingredient in any civilization is progress. So the media should focus on positive news.
A.
Y
B.
N
C.
NG
【单选题】K2Cr2O7溶液中存在平衡：Cr2O72-（橙色）+H2O CrO42-（黄色）+2H+。用K2Cr2O7溶液进行下列实验： 结合实验，下列说法不正确的是
A.
①中溶液橙色加深，③中溶液变黄
B.
②中Cr2O72-被C2H5OH还原
C.
对比②和④可知K2Cr2O7酸性溶液氧化性强
D.
若向④中加入70%H2SO4溶液至过量，溶液变为橙色
【简答题】Willam Shakespeare was a writer of plays and poems. Some of his most famous plays are Hamlet, Romeo and Juliet, Macbeth .He wrote thirty-seven plays in all. They are still popular today. He was born i...
【单选题】In his plays Shakespeare _____ his characters live through their language. D
A.
would make
B.
had made
C.
made
D.
makes
【简答题】利用Cr 2 O 7 2－ +H 2 O⇋2CrO 4 2－ +2H + 的K＝10 14 和Ag 2 CrO 4 的溶度积以及Ag + +e － ⇋Ag标准电极电势求2Ag 2 CrO 4 +2H + +4e － ⇋4Ag+Cr 2 O 7 2－ +H 2 O的标准电极电势。
【简答题】William Shakespeare was a writer of plays and poems. Some of his most famous plays are Hamlet, Romeo and Juliet, Macbeth. He wrote thirty-seven plays in all. They are still popular today. He was born ...
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