设计概算审查的方法有（）。 A．重点审查法 B．对比分析法 C．全面审查法 D．联合

关于性格的说法不正确的是

A．是人格的核心

B．主要由遗传决定

C．受人的意识倾向性制约

D．反映一个人的生活经历

E．有肯定和否定的性质

"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.

13（）

A.replacing

B.repairing

C.buying

D.upgrading

继电保护按故障判据分类有过流、低压、低周、零压、失磁、零流，另外非电量：温度、瓦斯保护。

流动性偏好是指人们宁愿持有流动性高但不能生利的货币，也不愿持有其他虽能生利但较难变现的资产的心理动机。一般是为了便于应付日常支出；或应付意外的支出；或是为了投机取利。下列现象适于用流动性偏好来加以解释的是（）

①孩子一出生，家长就为孩子未来上大学办理教育储蓄

②金融危机背景下，股市动荡，股民纷纷退出股市

③尽管银行连续降息，但人们仍将大量存款放在银行

④经济不景气，张某为防下岗，不乱花钱

A.①③

B.③④

C.②④

D.②③

下列食物中含钙最丰富的是（）。

A.粮谷食物

B.瘦牛肉

C.鸡肉

D.牛奶

E.沙棘