工业上从硒的废料中提取硒的方法之一是用H2SO4和NaNO3处理废料，获得亚硒酸和少量硒酸。加入盐酸共热，硒酸被转化为亚硒酸(2HCl+H2SeO4==H2SeO3+Cl2+H2O)，再将SO2通入亚硒酸溶液中，单质硒即析出。下列叙述正确的是 （ ）
| A．H2SeO4的氧化性强于于Cl2 | B．亚硒酸氧化性强于亚硫酸 |
| C．亚硒酸的还原性强于亚硫酸 | D．析出1molSe需H2SeO3、SO2、H2O各1mol |
相关试题
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— ______ , as a matter of fact
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