单项选择题

下列情况中，可以向气瓶中充装气体的是（　　）。

A.无法判定瓶内气体
B.瓶内无剩余压力
C.没有超过检验期
D.氧化或强氧化性气体气瓶沾有油脂的
<上一题 目录 下一题>
热门 试题

单项选择题
重氮化工艺安全控制的基本要求包括反应釜温度和压力的报警和联锁、反应物料的比例控制和联锁系统、紧急冷却系统等。重氮化工艺宜采用的控制方式不包括（ ）。
A.设立紧急停车系统
B.设立安全泄放系统
C.惰性气体保护的联锁装置
D.加入急冷氮气或氢气的系统
未分类题
Since pleasure is the first good and natural to us, for this very reason we do not choose every pleasure, but sometimes we pass over many pleasures, when greater discomfort accrues to us as the result of them; and similarly we think many pains better than pleasures, since a greater pleasure comes to us when we have endured pains for a long timE.Every pleasure then because of its natural kinship to us is good, yet not every pleasure is to be chosen; even as every pain is also an evil, yet not all are always of a nature to be avoideD.Yet by a scale of comparison and by the consideration of advantages and disadvantages we must form. our judgement on all these matters. For the good on certain occasions we treat as bad, and conversely the bad as gooD.We must consider that of desires some are natural, others vain, and of the natural some are necessary and others merely natural; and of the necessary some are necessary for happiness, others for the repose of the body, and others for very lifE.Unhappiness comes either through fear or through vain and unbridled desire; but if a man curbs these, he can win for himself' the blessedness of understanding. Of desires, all that do not lead to a sense of pain, if they are not satisfied, are not necessary, but involve a craving which is easily dispelled, when the object is hard to procure or they seem likely to produce harm. Wherever in the case of desires which are natural, but do not lead to a sense of pain, if they are not fulfilled, the effort is intense, such pleasures are due to idle imagination, and it is not owing to their own nature that they fail to be dispelled, but owing to the empty imaginings of the man.The disturbance of the soul cannot be ended nor true joy created either by the possession of the greatest wealth or by honour and respect in the eyes of the mob or by anything else that is associated with causes of unlimited desires. We must not violate nature, but obey her; and we shah obey her if we fulfil the necessary desires and also the natural, if they bring no harm to us, but sternly reject the harmful. The man who follows nature and not vain opinions is independent in all things. For in reference to unlimited desires even the greatest wealth is not riches but poverty.Insofar as you are in difficulties, it is because you forget nature; for you create for yourself unlimited fears and desires. It is better for you to be free of fear lying upon a pallet, than to have a golden couch and a rich table and be full of troublE.What does 'greater discomfort accrues to us' in Paragraph 1 mean here?A.We get greater discomfort over a period of timE.B.We are tortured by greater discomfort.C.Greater discomfort exists in our body.D.Greater discomfort makes us miserablE.
A.B.
C.
D.
E.
What
F.We
G.
B.We
H.
C.Greater
I.
D.Greater
相关试题