A、STM-1光接口
B、2Mbps
C、34Mbps
D、140Mbps
A、establishes a boundary around the topic
B、charts an orderly route for the paper
C、restates briefly the main points of original source in your own words
D、tells the reader what to expect from the rest of the paper
2.6 Two rods, AC and AD, are attached at A to lever AB. Assuming the lever is in equilibrium, and knowing that F1 = 200 N, F2 = 175 N, and1 = 30°, determine (a) the inclination2 of the right-hand rod, (b) the resultant of the forces exerted by the rod.
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