当不慎有大量氯气逸出时，人们再逃生时，可以用浸有某种物质的一定浓度的水溶液的毛巾捂往鼻子，该物质最适宜采用的是( )
| A．NaOH | B．NaCl | C．KBr | D．NaHCO3 |
相关试题
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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 |
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