我
，第二振型{y}2=______。
- A.2
- B.3
- C.4
- D.5
- A.9
- B.8
- C.6
- D.5
- A.0
- B.<img src="//img1.yqda.net/question-name/57/b71d0672597ad2913726c45aa5a312.png" width="42" height="35"/>
- C.<img src="//img1.yqda.net/question-name/e6/249205cb157563b4b0ae26d8c9a33c.png" width="37" height="40"/>
- D.<img src="//img1.yqda.net/question-name/5b/e3c0cc012d441e3a1f6d9bdfd736b2.png" width="41" height="38"/>
- A.<img src="//img1.yqda.net/question-name/b3/952a9548eda920e1b6e68bfe8981c9.png" width="52" height="31"/>
- B.<img src="//img1.yqda.net/question-name/fb/d8193f0dc5cd87ff536197d35d603b.png" width="73" height="32"/>
- C.<img src="//img1.yqda.net/question-name/a0/9e23687257b39efeba062236c29b7e.png" width="48" height="35"/>
- D.<img src="//img1.yqda.net/question-name/b5/977f6225d20a207b507fd533e8122f.png" width="62" height="32"/>
- A.△<sub>1</sub>=0，△<sub>2</sub>=△
- B.△<sub>1</sub>=0，△<sub>2</sub>=-△
- C.△<sub>1</sub>=△，△<sub>2</sub>=0
- D.△<sub>1</sub>=-△，△<sub>2</sub>=0
- A.0.7
- B.0.5
- C.0.3
- D.0.1
- A.δ<sub>1</sub>=δ<sub>3</sub>
- B.δ<sub>1</sub>=δ<sub>4</sub>
- C.δ<sub>2</sub>=δ<sub>3</sub>
- D.δ<sub>2</sub>=δ<sub>4</sub>
- 24
-
图示结构CD杆的轴力为
- A.-F<sub>p</sub>
- B.-F<sub>p</sub>/2
- C.0
- D.F<sub>p</sub>
- A.δ<sub>11</sub>>0，δ<sub>22</sub><0
- B.δ<sub>11</sub><0，δ<sub>22</sub>>0
- C.δ<sub>11</sub><0，δ<sub>22</sub><0
- D.δ<sub>11</sub>>0，δ<sub>22</sub>>0
- A.<img src="//img1.yqda.net/question-name/17/d7998d4897939ce692f1520e23ab68.png" width="32" height="37"/>
- B.<img src="//img1.yqda.net/question-name/34/93252029ef6c2d3c6d95e2cb944e27.png" width="39" height="38"/>
- C.F<sub>HB</sub>
- D.2F<sub>HB</sub>
