The early American hero Benjamin Franklin is cited as______.
A. an example of squeezing more life out of his time
B. a man who loves life
C. a summary of the above statement
D. a warning to the American people
查看答案
图中结构A截面的转角(顺时针为正)为()。
A. 40/El
B. 20/El
C. -20/El
D. 26.67/E1
"肉不坚,腠理疏,则善病风。"其中指出与发病关系密切的因素是E.