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【简答题】
填写合适的诗句。 (5分) (1)我们的成长离不开母亲的关心和照顾。你能想到的歌颂母爱的诗句是_______________,_____________________。 (2)儿童是那样的天真可爱,“___________,__________________”写出了儿童瓜时的情景;“____________,____________”描绘了小孩“作戏”的情景;“__________________,__________________”描写了牧童骑在牛背上悠闲自在地吹笛的情景;“__________________,__________________”写出了儿童捕蝉前的专注。
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【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 fine?
A.
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause as phyxiation.
B.
Because carbon dioxide breaks down in fire into carton 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 neither poisonous nor toxic but is a relatively harmless gas.
【简答题】一张完整的零件图应包括一组图形、尺寸、___________、标题栏等内容。
【简答题】Why should you wear the gloves when operating the machine? In that way you may _________ any injury to your ________.
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