试题与答案

4辆车运送货物,每辆车可运送16次;7辆车运送,每辆车可运送10次,设增加的车辆数与

题型:单项选择题

题目:

4辆车运送货物,每辆车可运送16次;7辆车运送,每辆车可运送10次,设增加的车辆数与运送减少的次数成正比且每次运送货物相等,则运送货物总量最多是多少车次?()

A.74

B.72

C.68

D.64

答案:

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参考答案:电子从一个底物传递给分子氧的氧化与酶催化的由ADP和Pi生成ATP的磷酸化相偶联的过程。

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题型:单项选择题

根据《标准施工招标文件》,关于施工合同索赔程序的规定,正确的是( )。

A.设计变更发生后,承包人应在14天内向发包人提交索赔通知

B.索赔事件持续进行,承包人应在时间终了后立即提交索赔报告

C.承包人在发出索赔意向通知书后28天内,向监理人正式递交索赔通知书

D.索赔意向通知书发出后42天内,承包人应向监理人提交索赔报告及有关资料

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题型:单项选择题

If there is one thing scientists have to hear, it is that the game is over. Raised on the belief of an endless voyage of discovery, they recoil from the suggestion that most of the best things have already been located. If they have, today’s scientists can hope to contribute no more than a few grace notes to the symphony of science.

A book to be published in Britain this week, The End of Science, argues persuasively that this is the case. Its author, John Horgan, is a senior writer for Scientific American magazine, who has interviewed many of today’s leading scientists and science philosophers. The shock of realizing that science might be over came to him, he says, when he was talking to Oxford mathematician and physicist Sir Roger Penrose.

The End of Science provoked a wave of denunciation in the United States last year. "The reaction has been one of complete shock and disbelief, "Mr. Horgan says.

The real question is whether any remaining unsolved problems, of which there are plenty, lend themselves to universal solutions. If they do not, then the focus of scientific discovery is already narrowing. Since the triumphs of the 1960s—the genetic code, plate tectonics, and the microwave background radiation that went a long way towards proving the Big Bang—genuine scientific revolutions have been scarce. More scientists are now alive, spending more money on research, that ever. Yet most of the great discoveries of the 19th and 20th centuries were made before the appearance of state sponsorship, when the scientific enterprise was a fraction of its present size.

Were the scientists who made these discoveries brighter than today’s That seems unlikely. A far more reasonable explanation is that fundamental science has already entered a period of diminished returns. "Look, don’t get me wrong," says Mr Horgan. "There are lots of important things still to study, and applied science and engineering can go on for ever. I hope we get a cure for cancer, and for mental disease, though there are few real signs of progress.\

The sentence "most of the best things have already been located" could mean()

A. most of the best things have already been changed

B. most of the best things remain to be changed

C. there have never been so many best things waiting to be discovered

D. most secrets of the world have already been discovered

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