181. Because of the enormous research and development expenditures required of firms to survive in the electronics industry, an industry marked by rapid innovation and volatile demand, such firms tend to be very large.

182. A consumer may not think of household cleaning products as hazardous substances, but many of them can be harmful to health, especially if they are used improperly.

183. Archaeologists in Ireland believe that a recently discovered chalice, which dates from the eighth century, was probably buried to keep it from being stolen by invaders

184. As measured by the Commerce Department, corporate profits peaked in the fourth quarter of 1988 and have slipped since then, as many companies have been unable to pass on higher costs.

185. The recent surge in the number of airplane flights has clogged the nation&aposs air-traffic control system, leading to a 55-percent increase in delays at airports and prompting fears among some officials that safety is being compromised.

186. Judge Bonham denied a motion to allow members of the jury to go home at the end of each day rather than be con-fined to a hotel.

187. In one of the bloodiest battles of the Civil War, fought at Sharpsburg, Maryland, on September 17, 1862, four times as many Americans were killed as would later be killed on the beaches of Normandy during D-Day.

188. As a result of medical advances, many people who might once have died in childhood such infections as diphtheria, pneumonia, or rheumatic fever now live well into old age.

189. Proponents of artificial intelligence say they will be able to make computers that can understand English and other human languages, recognize objects, and reason like an expert--computers that will be used for such purposes as diagnosing equipment breakdowns or deciding whether to authorize a loan.

190. In the first period of religious rormism, Islamic political militancy was manifested in the rise of the Wahhabis in Arabia, the Sanusi in Cyrenaica, the Fulani in Nigeria, and the Mahdi in the Sudan, and inthe victory of the Usuli "mujtahids" in Shiite Iran and Iraq.

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