- A.<img src="//img1.yqda.net/question-name/c7/4c2b5d9cd01b8b4eff42465826d599.png" width="49" height="41"/>
 - B.<img src="//img1.yqda.net/question-name/ef/8086bd3579b3f524ca98f442a38386.png" width="44" height="48"/>
 - C.<img src="//img1.yqda.net/question-name/44/2a9f63c7fdd41e94e9c69957755932.png" width="51" height="37"/>
 - D.<img src="//img1.yqda.net/question-name/90/a31a9dfd46e251762f1f54b838848f.png" width="48" height="42"/>
 
- A.<img src="//img1.yqda.net/question-name/c0/01cb7da2d383c1e71427bebe265edf.png" width="19" height="38"/>
 - B.<img src="//img1.yqda.net/question-name/2c/f815a00b02322ae366715702ce88cd.png" width="19" height="46"/>
 - C.<img src="//img1.yqda.net/question-name/3a/55b2d722b84bca1d310a14feda7f27.png" width="18" height="42"/>
 - D.<img src="//img1.yqda.net/question-name/5a/c8677a22ccebd0603cd38e714030c8.png" width="17" height="38"/>
 
- A.轴力为零
 - B.剪力为零
 - C.弯矩为零
 - D.内力均不为零
 
- 19
 - 
									
图示结构的超静定次数为

 
- A.3
 - B.4
 - C.5
 - D.6
 
- A.-2F<sub>p</sub>a
 - B.-F<sub>p</sub>a
 - C.F<sub>p</sub>a
 - D.2F<sub>p</sub>a
 
- A.2
 - B.3
 - C.4
 - D.5
 
- 22
 - 
									
图示结构,1杆的轴力等于

 
- A.-30kN
 - B.-15kN
 - C.15kN
 - D.30kN
 
- A.<img src="//img1.yqda.net/question-name/88/90eadeba2e6854ab171ae2890a649f.png" width="44" height="26"/>
 - B.<img src="//img1.yqda.net/question-name/a3/f64dc22fda3636206243543fa2b5c9.png" width="36" height="25"/>
 - C.<img src="//img1.yqda.net/question-name/32/62368004b99d48201f3173c208ea1d.png" width="31" height="28"/>
 - D.<img src="//img1.yqda.net/question-name/ce/f02ea74eedc4b5c55ceb08304fe165.png" width="38" height="27"/>
 
- 24
 - 
									
图示体系为

 
- A.有多余约束的几何不变体系
 - B.无多余约束的几何不变体系
 - C.瞬变体系
 - D.常变体系
 
- 25
 - 
									
图示支座对应的支座反力为

 
- A.<img src="//img1.yqda.net/question-name/cc/0c5f62dbba8ac50d95d119ea054306.png" width="95" height="47"/>
 - B.<img src="//img1.yqda.net/question-name/5c/45013b9ddc5a48163f69c4f43b86e7.png" width="95" height="48"/>
 - C.<img src="//img1.yqda.net/question-name/e3/93154c945d98c58a4df13ba61b250f.png" width="69" height="34"/>
 - D.<img src="//img1.yqda.net/question-name/f1/9520cd5dee9f55ae567f36da7c6e2c.png" width="108" height="33"/>
 
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