下列除去杂质（括号内的物质是杂质）时，选用的试剂或方法正确的是
| |
A |
B |
C |
D |
| 试样 |
NaCl溶液（Na2CO3） |
NH4Cl固体（I2） |
CO2（SO2）[来 |
NaBr溶液（Br2） |
| 除杂试剂或方法 |
澄清石灰水 |
加热 |
NaOH溶液 |
用CCl4萃取、分液 |
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