A．isolatedB．forbiddenC．releasedD．banned
A. isolated
B. forbidden
C. released
D. banned
图所示结构及其基本结构的方法方程为δ11X1+△1p=△1，则△1为()。
A. X11/EA
B. -X11/EA
C. 0
D. X11/2EA
A．They call out the names of players in their cheers.B．They jump and dance and shout f
A. They call out the names of players in their cheers.
B. They jump and dance and shout for their team.
C. They wear clothes of a bright color.
D. They come from a special club.
图所示结构，当I2不变，I1增大时支座反力X1(绝对值)将()。
A. 增大
B. 减小
C. 不变
D. 不确定
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