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当前学科：煤矿运输知识考试
题目：
问答题
为什么架空乘人装置必须设有超速、打滑保护？
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推荐知识点:
常见的矿石破碎方法有5种。
鱼的骨骼肌组成与哺乳动物不同。
展露或刺激物的展露
下列变性病变应除外：（）
某患者，突发呼吸困难、发绀，右胸呈鼓音，呼吸音消失，最可能的诊断为（）。
Parkinson综合征患者的语言减少是由于（）
含乳饮料的新鲜乳含量应大于（），乳脂肪及乳蛋白的含量都应大于1%。
PPI网络读写通讯需要注意什么？
根据下列短文，回答题。 A panel of government officials is worried．The air quality in some areas is not good．Theair is polluted with soot．The officials worry that the air is harmful to the people who breathethe air．The officials are expels．They study the environment．They diSCUSS ways to stop theair pollution．The panel decided to make，some changes to the law． The mew plan places strict limits on how much soot call be released into the air．Now，ameasurement of 65 parts of soot is considered safe．The new plan would reduce that number to30．The daily limit of pollution in the air would be cut in half． These new standards would affect industry．The limits would also affect people who ownwood stoves and fireplaces．The country will keep track of the air quality every day．Peoplewould be required to stop burning wood when the levels are high．They could also install a kindof special fireplace．These fireplaces burn very little wood．They do not pollute the air asmuch．Some countries will punish families who violate the ban．They will have to pay a fine fornot complying with the law． Some states do not have much industry．Their pollution problem is not too bad．Theywould stiU have to regulate how much pollution is released into the air．The experts hope thatthis ban will help keep the air cleaner．Before the plan becomes a law the public will have a chance to comment on it．Citizenswill have ninety days to ask questions and voice concerns about the plan．Then it will becomea law．The panel is made up of________．
关于抑郁发作的诊断标准对于症状持续时间的要求是（）