单选题The ______ discovery of dinosaurs’ complete genes shocked the world and was received with disbelief.A successfulB allegedC convincingD malicious

Paleontologists hypothesize that modern birds evolved from the family of dinosaurs that included Tyrannosaurus rex. This hypothesis would be strongly supported if evidence that dinosaurs from this family had a body covering resembling feathers could be found, but so far no such evidence has been found.　 Which of the following, if true, would most help the paleontologists explain why no evidence of feathered dinosaurs has yet been found?

The ERX Edge Router responds to a received PPP over Ethernet Active Discovery Initiation （PADI） with which message type？（）

The skulls and pelvic bones of some species of dinosaur share characteristics with the skulls and pelvic bones of all modern birds. Even though not all dinosaurs have these characteristics, there are scientists who claim that all animals that do have these characteristics are dinosaurs.　 If the statements above and the claim of the scientists are true, which of the following must also be true?

A one-year old, the pre-school teachers were shocked to hear him speak in full sentences.

The ______ discovery of dinosaurs’ complete genes shocked the world and was received with disbelief.

Which tool provides A complete guide that makes it easier for partners, regardless of their experience level, to sell cisco unified communications solutions to their customers?（）

The ERX Edge Router responds to a received PPP over Ethernet Active Discovery Initiation(PADI) with which message type?（）

Which process occurs first during the Ethernet Discovery Stage process for a PPPoE service offering?（）

Practice 2　　Talk about fanciful thinking. One might as well ask if there will be a war that will end all wars, or a pill that will make us all good-looking. It is also a perfectly understandable question, given that half a million Americans will die this year of a disorder that is often discussed in terms that make it seem less like a disease than an unconquerable enemy.　　What tuberculosis was to the 19th century, cancer is to the 20th: an malevolent force that frightens people beyond all reason far more than, say, diabetes or high blood pressure. The welcome boom in cancer drugs owes its beginning to one of the 20th century’s greatest scientific insights: that cancer is caused not by depression or deteriorating environment or sexual repression, but by faulty genes. Every tumor begins with just one errant cell that has been unlucky enough to suffer at least two, but sometimes several, genetic mutations. Those mutations cause the cell to replicate wildly, allowing it to escape the control that genes normally maintain over the growth of new tissue. This realization has transformed cancer, in little more than a decade, from an utterly mysterious disease into a disorder whose molecular machinery is largely understood. This new view has sparked innovations that will manage the process and keep it from killing large numbers of people.

Don’t Blame DNA　　The really critical implication of the discovery still lies with the door that geneticists have opened on the environmental influences of our behaviour, our personalities and our health, 1 and with the critical blow it strikes on the idea of biological determinism.　　For the past decade, the public has witnessed a rising epidemic of tales of discoveries of genes that dispose humanity to homosexuality, to alcoholism, to political persuasion, to running ability, and to artistic taste.　　But even before yesterday’s revelations by Venter, scientists had stopped believing in the gay gene. Yet belief in its existence still persists among the public. The assault on biological determinism that geneticists have now triggered will be timely, and will prove that human nature is a lot more complex and intriguing than determinists have given it credit for. Even more importantly, the discovery has critical implications for our understanding of idea of free will.　　It has become increasingly fashionable for individuals particularly in the United States to blame actions and crimes on the influence of their genes. Consider the following story. A young American woman, Glenda Sue Caldwell, was convicted of killing her child and was jailed for life. Only later did she begin to display the symptoms of Huntington’s Disease, an inherited brain disorder that produces horrific delusions and uncontrolled movements. Claiming she was a victim of her genes, the woman was cleared on appeal.　　Since then, several other U.S. defendants accused of violent crimes have argued that they too were innocent victims of their genes. They were not responsible for their actions. Their genes were. None of these people have yet succeeded in persuading courts of their innocence and their genes’ guilt. Most lawyers felt such an outcome was nevertheless inevitable. In other words, genetic predestination could soon have been used to excuse murder or robbery—if it had not been for this discovery that we lack the genes to thus dispose us!　　Kevin Davies is the author of The Sequence, a story of the human genome race11. He said, “There has been a recent study on perfect pitch, the ability to know the absolute pitch of a musical note, that strongly suggests that is acquired through the inheritance of a single gene.”　　“That may sound like a clear-cut piece of biological determinism. However, there is a crucial corollary: you have to be exposed to early musical training for the ability to materialize. 13 In other words, even in seemingly simple inherited abilities, nurture has a role to play.”　　And then there is the case quoted by Venter. “Everyone talks about a gene for this and that. But it is not like that. Take the example of colon cancer. People say there is a gene that predisposes us to the disease. And certainly it runs in families. It is caused by an inherited weakness in one gene that controls DNA repair in other genes. 14 But that gene is found in cells in every part of the body. However, it is only the colon where we find all sorts of toxins and bacteria that provide the harsh circumstances that cause that gene to finally break down and for cancer to spread.”　　In short, it is not a colon cancer gene but a gene that affects our ability to respond to the environment. And that, is what human nature is all about.