皮皮学，免费搜题
登录
搜题
【单选题】
Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?A.
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation
B.
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas
C.
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas
D.
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I like ____color of your coat. I'll buy_____ blouse like this color.
A.
the; the
B.
a; /
C.
the; a
D.
a; the
【单选题】工程项目各阶段中，工作量不大，但却十分重要的阶段是( )。
A.
工程项目策划和决策阶段
B.
工程项目准备阶段
C.
工程项目实施阶段
D.
工程项目竣工验收和总结评价阶段
【单选题】具5’一CpGpGpTpAp-3顺序的单链DNA能与下列哪种RNA杂交?( )
A.
5’一GpCpCpAp-3’
B.
5’一GpCpCpApUp-3’
C.
5’一UpApCpCpGp-3’
D.
5’一TpApCpCpGp-3’
【简答题】小儿的关节间隙较成人宽，是由于小儿的 [填空(1)]A. 骺软骨较厚
相关题目：