我
- A. <img src="//img1.yqda.net/question-name/49/c32c386f8c87263589089b32bdcb91.png" width="126" height="51"/>
- B. <img src="//img1.yqda.net/question-name/ad/b67209296a2ec50e33e0c0ea1e85ef.png" width="127" height="55"/>
- C. <img src="//img1.yqda.net/question-name/45/e7f869dcb084707f05f923b6463fdd.png" width="127" height="52"/>
- D. <img src="//img1.yqda.net/question-name/4c/b51a9f981e1ff08968ac2a4411581d.png" width="118" height="58"/>
- A.2
- B.3
- C.4
- D.5
- A.拉力P
- B.拉力√2P
- C.压力P
- D.压力√2P
- A.应小于这种支座反力的未知个数
- B.应等于这种支座反力的未知个数
- C.应大于这种支座反力的未知个数
- D.与这种支座反力的未知个数无关
- A.P=0
- B.P=1/2qa
- C.P=qa
- D.P=2qa
- A.2kN
- B.4kN
- C.2√2kN
- D.√5kN
- A.零杆5根，压杆3根
- B.零杆6根，压杆3根
- C.零杆5根，压杆2根
- D.零杆6根，压杆2根
- A.RB=0
- B.RB=P
- C.RB=-P/2
- D.RB=-P
- A.BD杆拉力10kN
- B.BF杆压力14.14kN
- C.DF杆压力14.14kN
- D.CD杆拉力20kN
