【正文】 lated. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced.The word related is closest in meaning to which of following?(A) connected(B) described(C) pleted(D) identified061. If observations confirm the scientists39。s dominant, mostdistinctive featurethe ocean. Humans have a bias toward land that sometimes gets in the way of truly examining global issues.The word bias is closest in meaning to which of following?(A) concern(B) disadvantage(C) attitude(D) prejudice047. The prevailing（占優(yōu)勢(shì)的 主要的 流行的 普遍的） winds in the Great Basin are from the west. Warm, moist air from the Pacific Ocean is forced upward as it crosses the Sierra Nevada.The word prevailing is closest in meaning to which of following?(A) most frequent(B) occasional(C) gentle(D) most dangerous048. There seem to have been several periods within the last tens of thousands of years when water accumulated（堆積） in these basins. The rise and fall of the lakes were undoubtedly linked to the advances and retreats of the great ice sheets that covered much of the northern part of the North American continent during those times.The word accumulated is closest in meaning to which of following?(A) dried(B) flooded(C) collected(D) evaporated蒸發(fā)049. All living creature, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre（奇形怪狀的） animal that, among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets?The phrase bizarre is closest in meaning to which of following?(A) odd奇怪的 古怪的(B) marine(C) simple(D) rare050. Its major enemies are fish and crabs, when attacked, it squirts all its internal organs into the water. It also casts off（擺脫 拋棄） attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attacked or even touched。s film Birth of a Nation, which was released in 1915.The word posed is closest in meaning to which of following?(A) selected(B) bined(C) played(D) createdThe word scores is closest in meaning to which of following?(A) totals(B) successes(C) musical positions(D) groups of musiciansc 041. The Earth prises three principal layers: the dense, ironrich core, the mantle made of silicate rocks that are semimolten at depth, and the thin, solidsurface crust.The word prises is closest in meaning to which of following?(A) adapts to(B) benefits from(C) consists of(D) focuses ond 042. These plates move over the semimolten lower mantle to produce all of the major topographical features of the Earth. Active zones where intense（強(qiáng)烈的 緊張的 認(rèn)真的） deformation occurs are confined to the narrow, interconnecting boundaries of contact of the plates.The word intense is closest in meaning to which of following?(A) surface(B) sudden(C) rare(D) extreme盡頭的 極端的 極限a 043. New oceanic crust is formed along one or more margins of each plate by material issuing from deeper layers of the Earth39。s was only nine percent) , another large population wave was ing over the horizon. It would be posed of the children who were born during the period of the high birth rate prior to 1957.The phrase prior to is closest in meaning to which of following?(A) behind(B) since(C) during(D) preceding在先的 在前的 前面的019. Advocates of organic foods a term whose meaning varies greatly frequently proclaim that such products are safer and more nutritious than others.The word Advocates is closest in meaning to which of following?(A) Proponents(B) Merchants(C) Inspectors(D) Consumers020. There are numerous unsubstantiated（未經(jīng)證實(shí)的 沒(méi)有事實(shí)根據(jù)的） reports that natural vitamins are superior to synthetic ones, that fertilized eggs are nutritionally superior to unfertilized eggs, that untreated grains are better than fumigated grains, and the like.The word unsubstantiated is closest in meaning to which of following?(A) unbelievable(B) uncontested(C) unpopular(D) unverified021. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers, particularly those with limited ines, distrust the regular food supply and buy only expensive organic foods instead.The word maintain is closest in meaning to which of following?(A) improve(B) monitor(C) preserve(D) restore022. In addition, there were performers and since considerable importance was attached to avoiding mistakes in the enactment of rites, religious leaders usually assumed that task.The word considerable is closest in meaning to which of following?(A) thoughtful(B) substantial 牢固的 充實(shí)的 實(shí)質(zhì)上的(C) relational(D) ceremonial023. In addition, there were performers and since considerable importance was attached to avoiding mistakes in the enactment（演出 展現(xiàn) 規(guī)定 通過(guò)） of rites, religious leaders usually assumed that task.The word enactment is closest in meaning to which of following?(A) establishment(B) performance(C) authorization(D) season024. Staggering（難以置信的 令人震驚的） tasks confronted the people of the United States, North and South, when the Civil War ended. About a million and a half soldiers from both sides had to be demobilized, readjusted to civilian life, and reabsorbed by the devastated economy. The word Staggering is closest in meaning to which of following?(A) specialized(B) confusing(C) various(D) overwhelming025. About a million and a half soldiers from both sides had to be demobilized, readjusted to civilian life, and reabsorbed by the devastated（毀滅性的） economy. The word devastated is closest in meaning to which of following?(A) developin