题目内容
轴测图的基本参数主要有轴间角和轴向变形系数。
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Science is interesting and exciting. Why? Science helps you(31) the world in which you live. For example, science explains how airplanes fly and how birds find their way when they _____(32) long distances. Besides, people use science to make discoveries that have _____(33) value. One of these discoveries is the____(34) of light to carry telephone messages through a glass wire. (35) is the lengthening of human life through the use of heart pacemakers and other mechanical devices.In the future, there will (36) be an endless number of new discoveries. These discoveries will (37) your career and your daily life. Television, computers, and space shuttles are part of today’s world. Who can imagine what new, yet-to-be-discovered (38) lie ahead? In the future, scientists may discover how to predict earthquakes and how to produce an endless (39) of energy. (40) you may live and work in a space station in orbit around the earth. Scientists will continue to make discoveries that will change the world in which you live.A) developments B) Anyway C) supply D) likely E) urgeF) tackle G) Another H) practical I) Someday J) understandK) severe L) argument M) use N) affect O) travel
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