举一反三
- 曲线[imgwidth="59"height="27"src="https://p.ananas.chaoxing.com/star3/origin/3cc99583084ffcc89a960073fcd99335.png"]与直线[imgwidth="77"height="41"src="https://p.ananas.chaoxing.com/star3/origin/9b130a364a2754b18314b4d1622ea3a4.png"]及[imgwidth="37"height="21"src="https://p.ananas.chaoxing.com/star3/origin/8951f704839e2c8e32609744580906d7.png"]所围成的区域的面积S(). A: imgwidth="37"height="41"src="https://p.ananas.chaoxing.com/star3/origin/cf2bafeed7198528d3b7c952a5092ab8.png" B: C: D:
- 设是闭区域:,,则https://p.ananas.chaoxing.com/star3/origin/67f3b9ce1bda9b4c999134a2f3035a9c.pnghttps://p.ananas.chaoxing.com/star3/origin/3dbbc854a126017299127fa64bccd615.pnghttps://p.ananas.chaoxing.com/star3/origin/bc5ca4972bce897f0cca16630df18fda.pnghttps://p.ananas.chaoxing.com/star3/origin/80014c2d2a19dc5bb425db83989526d0.png
- <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"/>()
- 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
- 由曲面, 所围成的立体体积为____.https://p.ananas.chaoxing.com/star3/origin/0e04a28f258a8257c1d5b0c7d873453a.pnghttps://p.ananas.chaoxing.com/star3/origin/f997a2ca2799aa358f2a193c69917891.png
内容
- 0
图示等直圆轴AB由AC和CB两段组成，若AC段的切变模量为G，CB段为刚性轴，则相对扭转角<img src="http://p.ananas.chaoxing.com/star3/origin/56a89b473ce7e624847e5ff047e6ba1d.jpg" />有四种答案<img src="http://p.ananas.chaoxing.com/star3/origin/36eb99677f2e0a7f3f0db1d380a0da85.png" /> A: <img src="http://p.ananas.chaoxing.com/star3/origin/db07e5da4130413215fde86c1d56244f.jpg" /> B: <img src="http://p.ananas.chaoxing.com/star3/origin/e54505c73180025d082603e94c176c94.jpg" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/ec2c47138dd3471481a4eeefa044032c.png" /> D: <img src="http://p.ananas.chaoxing.com/star3/origin/aabcaa3a7a41210a1eb33c2f1c63cd5e.jpg" />
- 1
设是圆,则https://p.ananas.chaoxing.com/star3/origin/d8b5edc9a2457c461a3685877f8606ab.pnghttps://p.ananas.chaoxing.com/star3/origin/5f3c1256fa1597901980dc868dfb57f7.pnghttps://p.ananas.chaoxing.com/star3/origin/1932e2a8e9452d4d6f94177a0ca40384.pnghttps://p.ananas.chaoxing.com/star3/origin/5785decddcc5b175015fc7c46d4d8405.png
- 2
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" />
- 3
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" />
- 4
设,,矩阵,则秩 ____。https://p.ananas.chaoxing.com/star3/origin/37ef575fe498777db654afddca62fe2c.pnghttps://p.ananas.chaoxing.com/star3/origin/a615458f7dcae581d0fff21cde15a403.pnghttps://p.ananas.chaoxing.com/star3/origin/290ba9cd94f47cfdfb6c2f491dc6ba09.pnghttps://p.ananas.chaoxing.com/star3/origin/4552fd27a3592e03f9b28737ec534441.png