刘文早年丧偶，现有三室一厅的房屋一套。刘文有四个子女，大儿子在外地成家并工作；其他三人均在本市，其中二儿子有工作并已成家，另有住房；三儿子未婚，但已工作，在单位居住；四女儿正在读书，与刘文共同居住。2010年，刘文因病去世，四个子女为刘文房屋如何分配产生争议。二儿子、三儿子和四女儿认为，三儿子尚未成家，应分得一间房屋；四女儿还在读书，长期照顾刘文，应分得其余房屋。二儿子也在本市，经常照料刘文，也应得到相应补偿。而大儿子长期在外地，未尽照顾父亲之责，不应分得房屋。对此大儿子坚决反对，认为自己享有继承权，家庭负担又重，理应分房。最后四人未达成分割协议。不久大儿子因要回去上班先行离开。后来，张某主动要求购买该房，于是三人告知大儿子有人高价购房，大儿子书面表示同意。于是，三人将房屋卖给了张某，并办理了过户手续。大儿子知道后，觉得价格偏低，认为合同无效，从外地赶回本市要求张某搬出并退还房屋。请回答下列问题并说明理由：

张某是否有权取得该房屋的所有权？

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 term "the Big Bang" probably refers to（）

A. the genetic code theory

B. a geological theory

C. a theory of the origin of the universe

D. the origin and the power of atomic energy