【正文】 it may even be that later generations will e to regard the Antarctic as the natural storehouse for the whole world. Plans are already on foot to set up permanent bases on the shores of this continent, and what so few years ago was regarded as a “dead continent” now promises to be a most active center of human life and endeavor. did man begin to explore the Antarctic? 100years ago. this century. the beginning of the 19th century. 1798. must the explorers be, even though they have modern equipment and techniques? and tough and arrogant. and humorous. and smart. most healthy climate in the world is___. South America. the Arctic Region. the Antarctic Continent. the Atlantic Ocean. kind of metals and minerals can we find in the Antarctic? , coal and ores. , coal and uranium. , natural gas and uranium. , copper and natural gas. is planned for the continent? dams along the coasts. up several summer resorts along the coasts. the coast and whole territory. up permanent bases on the coasts. 第七篇答案： AACBD 第八篇 (Unit 2 passage4) At some time in your life you may have a strong desire to do something strange or terrible. However, chances are that you don’t act on your impulse, but let it pass instead. You know that to mit the action is wrong in some way and that other people will not accept your behavior. Perhaps the most interesting thing about the phenomenon of taboo behavior is how it can change over the years within the same society, how certain behavior and attitudes once considered taboo can bee perfectly acceptable and natural at another point in time. Topics such as death, for example, were once considered so upsetting and unpleasant that it was a taboo to even talk about them. Now with the publication of important books such as On Death and Dying and Learning to Say Goodbye, people have bee more aware of the importance of expressing feelings about death and, as a result, are more willing to talk about this taboo subject. One of the newest taboos in American society is the topic of fat. Unlike many other taboos, fat is topic that Americans talk about constantly. It’s not taboo to talk about fat。 it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target ans or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system. The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless. is the author’s main purpose in the passage? explain the specific functions of various hormones. provide general information about hormones. explain how the term “hormone” evolved. report on experiments in endocrinology. passage supports which of the following conclusions? human body requires large amounts of most hormones. hormones can replace a person’s natural supply of hormones if necessary. quantity of hormones produced and their effects on the body are related to a person’s age. short child of tall parents very likely had a hormone deficiency early in life. can be inferred from the passage that before the Bayliss and Starling experiments, most people believed that chemical integration occurred only___. sleep. the endocrine glands. control of the nervous system. strenuous exercise. word “l(fā)iberate” could best be replaced by which of the following? to the passage another term for exocrine glands is___. glands glands glands glands. 第六篇答案： BDCBA 第七篇 (Unit 2 Passage 3) The discovery of the Antarctic not only proved one of the most interesting of all geographical adventures, but created what might be called “the heroic age of Antarctic exploration”. By their tremendous heroism, men such as Shakleton, Scott, and Amundsen caused a new continent to emerge from the shadows, and yet that heroic age, little more than a century old, is already passing. Modern science and inventions are revolutionizing the endurance, future journeys into these icy wastes will probably depend on motor vehicles equipped with caterpillar traction rather than on the dogs that earlier discoverers found so invaluable and hardly parable. Few realize that this Antarctic continent is almost equal in size to South America, and enormous field of work awaits geographers and prospectors. The coasts of this continent remain to be accurately charted, and the maping of the whole of the interior presents a formidable task to the cartographers who undertake the work. Once their labors are pleted, it will be possible to prospect the vast natural resources which scientists believe will furnish one of the largest treasure hoards of metals and minerals the world has yet known, and almost inexhaustible sources of copper, coal, uranium, and many other ores will bee available to man. Such discoveries will usher in an era of practical exploitation of the Antarctic wastes. The polar darkness which hides this continent for the six winter months will be defeated by huge batteries of light, and make possible the establishing of airfields for the future intercon