原则上由受托方设置独立班组进行管理；受条件限制无法设置独立班组进行管理的，每班组管辖

用你所学化学知识分析，下列说法正确的是（　　）

A．金刚石和石墨的物理性质完全相同

B．用甲醛溶液侵泡海产品使海产品保鲜

C．塑料、合成纤维和棉纤维都是属于合成材料

D．不能在碱性土壤中追加铵态氮肥，否则生成氨气降低肥效

女，25岁，心悸、气促、下肢水肿4年。心脏叩诊胸骨左缘第2、3肋间心浊音界增大，心腰丰满，听诊局限于心尖区的低调、隆隆样、舒张中晚期递增型杂音。

上例最可能的诊断为（）

A.二尖瓣狭窄

B.室间隔缺损

C.动脉导管未闭

D.二尖瓣关闭不全

E.扩张型心肌病

下列有关文学常识的表述，有错误的一项是        [ ]

A．朱自清，现代著名散文家、诗人、学者、民主战士。其散文以朴素缜密、清隽沉郁、语言洗练、文笔清丽著称，极富有真情实感。代表作有《桨声灯影里的秦淮河》等。   

B．苏轼，字子瞻，号“东坡居士”，世人称其为“苏东坡”。北宋著名文学家、书画家、词人、诗人、美食家，唐宋八大家之一，豪放派词人代表。其诗、词、赋、散文均成就极高，且善书法和绘画，是中国文学艺术史上罕见的全才。   

C．刘基，字伯温。元末明初军事家、政治家及诗人。他以辅佐朱元璋完成帝业、开创明朝并尽力保持国家的安定而驰名天下。在文学史上，刘基与宋濂、高启并称“元初诗文三大家”。   

D．林纾，字琴南。中国近代著名文学家、小说翻译家。福建闽县（今福州）人，我国近代著名文学家，以意译外国名家小说著称于世。

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

干姜保护胃黏膜，促进消化与其（）功效有关。