举一反三
- 下图所示机构自由度计算,( )是正确的。 A: mg src="http://p.ananas.chaoxing.com/star3/origin/cb07ca0fb12be985c301490389c1e187.jpg" B: F=3×7 –(2×9 + 2 – 2)– 2 = 1 C: F=3×7 –(2×9+ 2– 0)– 0 = 1 D: F=3×7 –(2×8+ 2 – 0)– 2 = 1 E: F=3×5 –(2×6+ 2– 0)– 0 = 1
- <img src="http://p.ananas.chaoxing.com/star3/origin/560b9590e4b040cfea1a582d.png"/> <img src="http://p.ananas.chaoxing.com/star3/origin/560b9591e4b040cfea1a582e.png"/> <img src="http://p.ananas.chaoxing.com/star3/origin/560b9593498ed981287fd9e9.png"/>(), <img src="http://p.ananas.chaoxing.com/star3/origin/560b9593498ed981287fd9ea.png"/>(); <img src="http://p.ananas.chaoxing.com/star3/origin/560b9593498ed981287fd9ec.png"/> <img src="http://p.ananas.chaoxing.com/star3/origin/560b9593e4b040cfea1a5830.png"/>(), <img src="http://p.ananas.chaoxing.com/star3/origin/560b9593498ed981287fd9ea.png"/>()
- 错误1: 错误2: 错误3: 错误4:https://p.ananas.chaoxing.com/star3/origin/f3848a1490dc70b67502f23cb8a243a3.jpg
- 错误1: 错误2: 错误3: 错误4:https://p.ananas.chaoxing.com/star3/origin/da50b19fe94e35c6326124e9d69be679.jpg
- 下列符号表示两拍的是 A: <img src="http://p.ananas.chaoxing.com/star3/origin/fc00ca0cec8dd427dc15fc2958c82fba.jpg" /> B: <img src="http://p.ananas.chaoxing.com/star3/origin/2ab1bae8cce890765fe35f350c9da3a3.jpg" /> C: <img src="http://p.ananas.chaoxing.com/star3/origin/c161896591ea673a7e87bf05823878e9.jpg" /> D: <img src="http://p.ananas.chaoxing.com/star3/origin/f4d74c1de4a91f83bc4349e158eeeb08.jpg" />
内容
- 0
图示应力状态,按第三强度理论校核,强度条件为( )。<img src="http://p.ananas.chaoxing.com/star3/origin/dd3fe2c04248453f934a5bf078c2096b.png"/> A: <img src="http://p.ananas.chaoxing.com/star3/origin/008fe5632455993a70b7aa9bf29fb1ef.jpg" /> B: <img src="http://p.ananas.chaoxing.com/star3/origin/9ffd49637b4c58b1fa85151ed63de699.jpg" /> C: <img src="http://p.ananas.chaoxing.com/star3/origin/5b8e6c02b33bd63b6fd0f121449e26b0.jpg" /> D: <img src="http://p.ananas.chaoxing.com/star3/origin/4896125577fc13ab75d592f1f3511baa.jpg" />
- 1
设随机变量,则=。(注: )http://p.ananas.chaoxing.com/star3/origin/39a36111a374e238aff071bcbee7ad00.gifhttp://p.ananas.chaoxing.com/star3/origin/55967500e4b0ec35e2d51bb3.gifhttp://p.ananas.chaoxing.com/star3/origin/17322168bc793ffb671aa05ad0e2835c.gif
- 2
下面的和声连接哪个是正确的? A: <img src="http://p.ananas.chaoxing.com/star3/origin/afb63329872ba3fffe9ea4d739fe8f02.jpg"/> B: <img src="http://p.ananas.chaoxing.com/star3/origin/1eb01898a7c50336ff31060e4e1beafb.jpg"/> C: <img src="http://p.ananas.chaoxing.com/star3/origin/84a3d1257ae9204804d97aa14023a347.jpg"/>
- 3
在如下方框图中,产生正弦波振荡的相位条件是ΦF=土ΦA。https://p.ananas.chaoxing.com/star3/190_190c/51b78a1144fa0cccbecadc36cdb83483.jpg?rw=3264&rh=1616&_fileSize=3984598https://p.ananas.chaoxing.com/star3/origin/51b78a1144fa0cccbecadc36cdb83483.jpg?rw=3264&rh=1616&_fileSize=3984598
- 4
根据正面和侧面投影,选择正确的水平投影___ A: mg src="http://p.ananas.chaoxing.com/star3/origin/36969903a2466dc741c0c4fb2e1719d0.png">; B: (2) C: (1) D: (4) E: (3)