①陈述句是命题；
②“至少有一个实数x，使x*x*x+1≤0”是真命题；
③命题“x、y、z不能同时大于0”的否定是“x、y、z同时大于0”；
④若p是真命题，q是假命题，则p∧q是真命题；
⑤若“mx-2＞0”充要条件是“x-2＞0”，则m=1．
其中正确说法的序号是______．
【专题 GMAT逻辑题】
The higher the level of certainvitamins and minerals in the bloodstream, the better a person's lung function, asmeasured by the amount of air the person can expel in one second. The lung functionof smokers is significantly worse, on average, than that of nonsmokers. Clearly,therefore, one way for smokers to improve their lung function is for them to increasetheir intake of foods that are rich in these helpful vitamins and minerals. Which of the following is an assumption on whichthis argument depends?
(A) Smokers are less likely than nonsmokers to have diets thatare rich in vitamins and minerals.
(B) The lung function of smokers whose diets are rich in thosevitamins and minerals is generally better than that of nonsmokers with comparablediets.
(C) People whose diets are deficient in those vitamins and mineralsdo not typically have other health problems in addition to diminished lung function.
(D) Stopping smoking will not typically improve lung functionmore than any diet changes can.
(E) Smoking does not introduce into the body chemicals thatprevent the helpful vitamins and minerals from entering the bloodstream.
一天晚上11点50分，天命来到自己家中，天命住在23楼。
他像往常一样坐在电脑旁看起33IQ里的恐怖推理。
天明发现自己已经看到凌晨3点了，原来他要去睡觉了。反正他也这样持续好几周了。
天命正要去睡觉时，突然发觉了什么，想跑，已经来不及了！
为啥捏？（题目中的内容绝对合乎常理，不要有任何质疑的地方，就算有，也要开发你的想象力变为可能。里面写的大部分都是线索）
