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　　151. The village chief dealt with land disputes and religious affairs. The  war chief led the men in fighting during occasional conflicts that broke out  with neighboring villages and directed the men in community building  projects.

　　The word "disputes" is closest in meaning to which of following?

　　(A) discussions

　　(B) arguments

　　(C) developments

　　(D) purchases

　　152. This had a considerable effect on cattle ranching, since the herds no  longer had unrestricted use of the plains for grazing, and the fencing led to  conflict between the farmers and the cattle ranchers.

　　The word "unrestricted" is closest in meaning to which of following?

　　(A) unsatisfactory

　　(B) difficult

　　(C) considerable

　　(D) unlimited

　　153. The steel wires used are galvanized-coated with zinc to make them  rustproof. The two wires that make up the line wire or cable are fed separately  into a machine at one end. They leave it at the other end twisted together and  barbed.

　　The word "fed" is closest in meaning to which of following?

　　(A) put

　　(B) eaten

　　(C) bitten

　　(D) nourished

　　154. The pressure exerted on the human body increases by 1 atmosphere for  every 10 meters of depth in seawater, so that at 30 meters in seawater a diver  is exposed to a pressure of about 4 atmospheres.

　　The words "exposed to" in line 6 are closest in meaning to

　　(A) leaving behind

　　(B) prepared for

　　(C) propelled by

　　(D) subjected to

　　155. Deep dives are less dangerous if helium is substituted for nitrogen,  because under these pressures helium does not exert a similar narcotic  effect.

　　The word "exert" is closest in meaning to which of following?

　　(A) cause

　　(B) permit

　　(C) need

　　(D) change

　　156. As a scuba diver descends, the pressure of nitrogen in the lungs  increases. Nitrogen then diffuses from the lungs to the blood, and from the  blood to body tissues.

　　The word "diffuses" is closest in meaning to which of following?

　　(A) yields

　　(B) starts

　　(C) surfaces

　　(D) travels

　　157. During ascent from a depth of 10 meters, the volume of air in the  lungs will double because the air pressure at the surface is only half of what  it was at 10 meters. This change in volume may cause the lungs to distend and  even rupture.

　　The word "rupture" is closest in meaning to which of following?

　　(A) hurt

　　(B) shrink

　　(C) burst

　　(D) stop

　　158. In the twentieth century, electron microscopes have provided direct  views of viruses and minuscule surface structures. The word "minuscule" is  closest in meaning to which of following?

　　(A) circular

　　(B) dangerous

　　(C) complex

　　(D) tiny

　　159. Unlike conventional electron microscopy, x-ray microscopy enables  specimens to be kept in air and in water, which means that biological samples  can be studied under conditions similar to their natural state.

　　The word "enables" is closest in meaning to which of following?

　　(A) constitutes

　　(B) specifies

　　(C) expands

　　(D) allows

　　160. Because of the wavelength of the x-rays used, soft x-ray microscopes  will never match the highest resolution possible with electron microscopes.  Rather, their special properties will make possible investigations that will  complement those performed with light-and electron-based instruments.

　　The word "Rather" is closest in meaning to which of following?

　　(A) significantly

　　(B) preferably

　　(C) somewhat

　　(D) instead

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