下图反映了某一股票的价格波动情况从中可以看出 A．企业经营状况直接决定股票价格

四级资质矿山救护队可以面向社会从事矿山及相关的救援技术服务活动。

如果把染色体、基因和DNA按从小到大的顺序进行排列，排列正确的是（　　）

A．染色体--基因--DNA

B．基因--DNA--染色体

C．染色体--DNA--基因

D．基因--染色体--DNA

电杆组立后（未架线），杆位横向偏离线路中心线不应大于100mm。（）

现代管理把经营决策当作管理的核心，重视人的积极因素，把人看作管理的主体，实行（）的管理。

A.以物为中心

B.以人为中心

C.政治为灵魂

D.赶、帮、超

"In the long run," as John Maynard Keynes observed, "we are all dead. " True. But can the (1) run be elongated in a way that makes the long run (2) And if so, how, and at what cost People have dreamt of (3) since time immemorial. They have sought it since the first alchemist put an elixir of (4) on the same shopping list as a way to turn lead into gold. They have (5) about it in fiction, from Rider Haggard’s "She" to Frank Herbert’s "Dune". And now, with the growth of (6) knowledge that has marked the past few decades, a few researchers believe it might be within (7) .

To think about the question, it is important to understand why organisms-people (8) -age in the first place. People are like machines: they (9) That much is obvious. However, a machine can always be (10) A good mechanic with a stock of spare parts can keep it going (11) . Eventually, no part of the (12) may remain, but it still carries on, like Lincoln’s famous axe that had three new handles and two new blade.

The question, of course, is whether the machine is worth (13) . It is here that people and nature (14) . Or, to put it slightly (15) , two bits of nature disagree with each other. From the individual’s point of view, (16) is an imperative. You cannot reproduce unless you are alive. A fear of death is a sensible evolved response and, since (17) is a sure way of dying, it is no surprise that people want to stop it in its tracks. Moreover, even the appearance of ageing can be (18) . It (19) the range of potential sexual partners who find you attractive-since it is a sign that you are not going to be (20) all that long to help bring up baby-and thus, again, curbs your reproduction.

3（）

A.mortality

B.immortality

C.no disease

D.no disaster