【正文】 hepassage? (A) Aviculturists (line I) (B) Gradient (line 8) (C) Incubation (line 15) (D) Embryo (line 24) Questions 2333 The mineral particles found in soil range in size from microscopic clay particles to large boulders. The most abundant particles— sand, silt, and clay— are the focus of examination in studies of soil texture. Texture is the term used to describe the line posite sizes of particles in a soil sample, typically several representative handfuls. (5) To measure soil texture, the sand, silt, and clay particles are sorted out by size and weight. The weights of each size are then expressed as a percentage of the sample weight. In the field, soil texture can be estimated by extracting a handful of sod and squeezing the damp soil into three basic shapes。 (2) thread, a pencil shape formed by rolling soil between the palms。 therefore, in soils with a high proportion of clay, the fine particles are measured on the (25) basis of their settling velocity when suspended in water .Since clays settle so slowly, they are easily segregated from sand and silt. The water can be drawn off and evaporated, leaving a residue of clay, which can be weighed. 23. What does the passage mainly discuss? (A) Characteristics of high quality soil (B) Particles typically found in most soils (C) How a high clay content affects the texture of soil (D) Ways to determine the texture of soil 24. The author mentions several representative handrals in line 4 in order to show (A) the range of soil samples (B) the process by which soil is weighed (C) the requirements for an adequate soil sample (D) how small soil particles are 25. The phrase sorted out in line 5 is closest in meaning to (A) mixed (B) replaced (C) carried (D) separated 26. It can be inferred mat the names of the three basic shapes mentioned in paragraph 2 reflect (A) the way the soil is extracted (B) the results of squeezing the soil (C) the need to check more than one handful (D) the difficulty of forming different shapes 27. The word dampened in line 15 is closest in meaning to (A) damaged (B) stretched (C) moistened (D) examined 28. Which of the following can be inferred from the passage about a soil sample with little or no clay in it? (A) It is not very heavy. (B) It may not hold its shape when molded. (C) Its shape is durable (D) Its texture cannot be classified 29. The word they in line 23 refers to (A) categories (B) sieves (C) larger particles (D) clay particles 30. It can be inferred from the passage that the sediment sieve has an advantage over the hand test in determining soil texture because (A) using the sieve takes less time (B) the sieve can measure clay (C) less training is required to use the sieve (D) the sieve allows for a more exact measure 31. During the procedure described in paragraph 3, when clay particles are placed into water they (A) stick to the sides of the water container (B) take some time to sink to the bottom (C) separate into different sizes (D) dissolve quickly 32. The word fine in line 24 is closest in meaning to (A) tiny (B) many (C) excellent (D) various 33. All of the following words are defined in the passage EXCEPT (A) texture (line 3) (B) ribbon (line 11) (C) sediment sieves (line 19) (D) evaporated (line 27) Questions 3443 A number of factors related to the voice reveal the personality of the speaker. The first is the broad area of munication, which includes imparting information by use of language, municating with a group or an individual, and specialized line munication through performance. A person conveys thoughts and ideas through (5) choice of words, by a tone of voice that is pleasant or unpleasant, gentle or harsh, by the rhythm that is inherent within the language itself, and by speech rhythms that are flowing and regular or uneven and hesitant, and finally, by the pitch and melody of the utterance. When speaking before a group, a person39。s tone can consciously or unconsciously reflect intuitive sympathy or antipathy, lack of concern or interest, fatigue, anxiety, enthusiasm or excitement, all of which are .usually discernible by the acute listener. Public performance is a manner of munication that is highly specialized with its own t