【简答题】工业上用电解饱和NaCl溶液的方法来制取NaOH、Cl 2 和H 2 ,并以它们为原料生产一系列化工产品,称为氯碱工业。 (1)若采用无隔膜法电解冷的食盐水时,Cl 2 会与NaOH充分接触,导致产物仅是NaClO和H 2 。无隔膜法电解冷的食盐水相应的离子方程式为 。 (2)氯碱工业耗能高,一种将电解池与燃料电池相组合的新工艺可以节(电)能30%以上。在这种工艺设计中,相关物料的传输与转化关系如...
【多选题】维纳的成败归因理论认为,学生对自己学习成败的原因常归结为
【单选题】弹条III型扣件调高量小于等于( )mm。
【多选题】维纳的成败归因理论认为,学生对自己学习成败的原因常归结为
【单选题】溶液中氢离子浓度以pH来表示,可采用下列哪种表达式?( )
【单选题】anyone wishing to enter the country ___________ apply for a visa first. It’s illegal not to.
【单选题】So often one hears children wishing they were grown up, and old people wishing they were young again. (76) Each age has its pleasures and its pains, and the happiest person is the one who enjoys what ...
A.
life for a child is comparatively easy
B.
a child is always loved no matter what he does
C.
if much is given to a child, he must do something in return
D.
only children are interested in life
【单选题】(47540) 弹条III型扣件调高量小于等于() mm 。
【多选题】维纳的成败归因理论认为,学生对自己学习成败的原因常归结为