【正文】 s rain forests does not seem surprising, considering the huge numbers of insects that prise the bulk of the species. One scientist found many different species of ants in just one tree from a rain forest. While every species is different from every other species, their (20) geic makeup constrains them to be insects and to share similar characteristics with 750,000 species of insects. If basic, broad categories such as phyla and classes are given more emphasis than differentiating between species, then the greatest diversity of life is unquestionably the sea. Nearly every major type of plant and animal has some representation there. (25) To appreciated fully the diversity and abundance of life in the sea, it helps to think small. Every spoonful of ocean water contains life, on the order of 100 to 100,000 bacterial cells plus assorted microscopic plants and animals, i。s surface. Given that two thirds of the Earth39。s surface features (C) The position of the ocean floors (D) The rates at which continents move of the following drawings best represents a transform contact (line 1314)? (A) (B) (C) (D) word margins in line 15 is closest in meaning to (A) edges (B) peaks (C) interiors (D) distances word support in line 17 is closest in meaning to (A) separate (B) create (C) reduce (D) hold to the passage, mountain range are formed when (A) the crust is remelted (B) two plates separate (C) a rift is flooded (D) continental plates collide in the passage does the author describe how oceans are formed? (A) Lines 34 (B) Lines 68 (C) Lines 1618 (D) Lines 1921 Questions 3240 Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity, the number of species in a particular ecosystem, to the health of the Earth and human wellbeing. Much has been written about the diversity of terrestrial anisms, particularly the (5) exceptionally rich life associated with tropical rainforest habitats. Relatively little has been said, however, about diversity of life in the sea even though coral reef systems are parable to rain forests in terms of richness of life. An alien exploring Earth would probably give priority to the pla39。s crust, for example, by volcanic eruptions of lava at midocean ridges. If at such a spreading contact the two plates support continents, a rift is formed that will gradually widen and bee flooded by the sea. The Atlantic Ocean formed like this as the American and AfroEuropean plates move in opposite directions. At the same time at margins of (20) converging plates, the oceanic crust is being reabsorbed by being subducted into the mantle and remelted beneath the ocean trenches. When two plates carrying continents collide, the continental blocks, too light to be drawn down, continue to float and therefore buckle to form a mountain chain along the length of the margin of the plates. word prises in line 1 is closest in meaning to (A) adapts to (B) benefits from (C) consists of (D) focuses on to the passage, on approximately what percent of the Earth39。s? (A) Calm, peaceful (B) Piano, violin (C) Key of C major (D) Directed by D. W. Griffith word posed in line 26 is closest in meaning to (A) selected (B) bined (C) played (D) created word scores in line 26 is closest in meaning to (A) totals (B) successes (C) musical positions (D) groups of musicians passage probably continues with a discussion of 13 (A) famous posers of the early twentieth century (B) other films directed by D. W. Griffith (C) silent films by other directors (D) the music in Birth of a Nation Questions 2231 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. There are two kinds of crust, a lower and denser oceanic crust and an upper, lighter continental crust found over only about 40 percent of the Earth39。s film Birth of a Nation, which was released in 1915. passage mainly discusses music that was (A) performed before the showing of a film (B) played during silent films (C) specifically posed for certain movie theaters (D) recorded during film exhibitions can be inferred that the passage about the majority of films made after 1927? (A) They were truly silent. (B) They were acpanied by symphonic orchestras. 12 (C) They incorporated the sound of the actors39。 an acpaniment of any kind was sufficient. Within a very short time, however, the incongruity of playing lively music to a solemn film became apparent, and film pianists began to take some care in matching their pieces to the mood of the film. (10) As movie theaters grew in number and importance, a violinist, and perhaps a cellist, would be added to the pianist in certain cases, and in the larger movie theaters small orchestras were formed. For a number of years the selection of music for each film program rested entirely in the hands of the conductor or leader of the orchestra, and very often the principal qualification for holding such a position was not skill or taste (15) so much as the ownership of a large personal library of musical pieces. Since the conductor seldom saw the films until the night before they were to be shown (if, indeed, the conductor was lucky enough to see them then), the musical arrangement was normally improvised in the greatest hurry. To help meet this difficulty, film distributing panies started the practice of (20) publishing suggestions for musical acpaniments. In 1909, for example, the Edison Company began issuing with their films such indications of mood as pleasant39。 supreme achievements for all of th