Production Technology [Question of the Day] Sunday, September 25, 2011
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This post was last edited by *nyang3390 on 2011-9-26 08:37. Multiple-choice question: 1. The gas that is both colored and toxic is ( ). A, Cl2 ； B, H2 ； C, CO ； D, CO2. 9. When metallic sodium catches fire, the substance or equipment that can be used to extinguish it is ( ). A、Kerosene ； B. Sand ； C. Foam fire extinguisher ； D. Wet cloth. Note: 2 |( |+ W1 I/ D/ V2 A0 ]6 A4 J 1. Please hide your replies; for instructions, see: http://bbs.hcbbs.com/thread-492556-1-1.html. 2. Do not edit after replying. . U* l2 Q! l+ t. B! g; d0 v All participants will receive a reward. 1、A ； 2、B( r-
Reply 1# pzhmotor AA
Reply 1# pzhmotor A,C
Reply 1# pzhmotor A B
Reply 1# pzhmotor A B
Reply 1# pzhmotor A B