- A.转动刚度改变,分配系数不变
 - B.转动刚度不变,分配系数改变
 - C.转动刚度和分配系数均不变
 - D.转动刚度和分配系数均改变
 
- A.<img src="//img1.yqda.net/question-name/94/15b4e79e05842d93ac9a568aecd7be.png" width="35" height="39"/>
 - B.<img src="//img1.yqda.net/question-name/40/a2ea3eaa09bdf6f13f9c75ef467be1.png" width="37" height="38"/>
 - C.<img src="//img1.yqda.net/question-name/a1/e3bcf0922bc0082b9a33ddf549c460.png" width="30" height="39"/>
 - D.<img src="//img1.yqda.net/question-name/26/1c68ec5979f2bb6f0dd12b6a43524a.png" width="42" height="37"/>
 
- A.<img src="//img1.yqda.net/question-name/5c/6c4e3146dbca7cea60482d4c6f5e58.png" width="71" height="38"/>
 - B.<img src="//img1.yqda.net/question-name/83/aa8f9dbcb2a2781c40510b61b4df39.png" width="84" height="38"/>
 - C.<img src="//img1.yqda.net/question-name/38/78bbc27d544a36c0e8285627ba6a5f.png" width="70" height="38"/>
 - D.<img src="//img1.yqda.net/question-name/80/245e61cebfd3fe93713889b64a23fd.png" width="69" height="35"/>
 
- 19
 - 
									
图示结构的超静定次数为

 
- A.1次
 - B.2次
 - C.3次
 - D.4次
 
- A.弯矩和剪力为零
 - B.剪力和轴力为零
 - C.轴力和弯矩为零
 - D.弯矩、剪力和轴力均不为零
 
- A.<img src="//img1.yqda.net/question-name/fb/bebbe490b6f8bae5efa8162d3deaae.png" width="126" height="93"/>
 - B.<img src="//img1.yqda.net/question-name/d1/ecc9c3445658de378bdc8340636947.png" width="127" height="97"/>
 - C.<img src="//img1.yqda.net/question-name/ba/4055da2e59c0a88128071bf68a67b9.png" width="126" height="100"/>
 - D.<img src="//img1.yqda.net/question-name/53/52fadc918c336afd27533266f8f9c9.png" width="133" height="95"/>
 
- A.-F<sub>P</sub>
 - B.0
 - C.F<sub>P</sub>
 - D.2F<sub>P</sub>
 
- A.<img src="//img1.yqda.net/question-name/14/e306379d6f07e1da9b7973aafe4dc1.png" width="114" height="103"/>
 - B.<img src="//img1.yqda.net/question-name/b3/ed578a9586c8c17671d88e5f3de94a.png" width="114" height="102"/>
 - C.<img src="//img1.yqda.net/question-name/a5/b3bb96163c2afd5bcd159ff67a2c19.png" width="120" height="101"/>
 - D.<img src="//img1.yqda.net/question-name/51/319ac9a54a034a061ac56e0183243e.png" width="123" height="104"/>
 
- A.水平反力和竖向反力均不变
 - B.水平反力和竖向反力均改变
 - C.水平反力不变,竖向反力改变
 - D.水平反力改变,竖向反力不变
 
- 25
 - 
									
图示体系是

 
- A.无多余约束的几何不变体系
 - B.有多余约束的几何不变体系
 - C.瞬变体系
 - D.常变体系
 
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