，在
位置，振子的动能和势能正好相等。（ ）
举一反三
- 定积分<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/40a96e021d184b53859fdd4926e16b1b.png" />等于（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/cde1094a25c3497f80373bc771f80513.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/54c773851e0348059f1ce37a91a948fc.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/e27823bdfcdc467faf41d0b330b00e15.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/6503ac83a84d4ae2ac241d6c3e33a59a.png" />
- 逻辑函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/7a28ab990f564e25a47249ee94eb1f20.png" />的最简“与－或”表达式为（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/13627d46b788407ea818c87bbc009fe0.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/5df5979516fe45758b8a1e4e729722a6.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/bab1ddffc2c24f4bbace96c67048e662.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/0b57d6e41e5242b2a1999a3beaf9b210.png" />
- 下列（ ）不属于中心支撑。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/b7b36299d8fb49c58fa83ef9ce64a739.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/73633e9d8616459490af2a472a7f9649.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/af19ae1f1e1f42ddbd45522c9ddbbea7.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/11cef2be0b5b46f6a30e71db95fd8476.png" />
- 逻辑函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/520c51d784294a05b7c0a58e9a006f8d.png" />的最小项之和表达式为（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/b29de4567e024993be29cf0772062626.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/c828662b80bf46969b13b8c2e141d796.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/e89e7dff660747259c21fedcc7586e09.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/11fe1998fad740bba3df120af96ae8a9.png" />
- 一元线性回归模型<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/08f92b38e98040ae8fae5a00cc3d58cf.png" />的经典假设包括（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/ef3467d1ca854d138e84f66981b5667c.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/396f61967f2d4bbcabcdd46becdad8d8.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/b178f5b4d9e147a382f0da1ce41e36de.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/493466511c304cafad3b3e0543a2ba73.png" />
内容
- 0
下列表达式正确的是（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/75f7ea2db81e4968935ff7dbf6bcfe8d.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/be3e6f241e1d4dfbb709ad85ee2af5a7.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/4018abdbc95f48d090fe4a27c3f8f74b.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/9a49429b28964f2ca698879294f61c60.png" />
- 1
对封闭体系下列关系不正确的是 ( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/33de521c59ba4344961155a79c6f72de.jpeg"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/51e7e3e39980468f9a3ffe46f583772b.jpeg"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/751ab162f4ea4fa2ad4c6bd3807f6193.jpeg"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/b693f29c25f64d529f6807718bc1dc39.jpeg">
- 2
下列定积分大小关系正确的是（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/6425a5641347401c96cfe410e9a49a6a.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/1a745dfce5354003a4b0b26edd8e2059.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/a953f9a57c264d6cb7b1e025a189af23.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/34dcf8af5beb4e5685097ef3fd73ae3d.png" />
- 3
用OLS估计经典线性模型<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/eb8ed6ad126745fa8aa3e6527980a6fa.png" />，则样本回归直线通过的点是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/64ecbf5286eb4fa083d00e749d64f6f2.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/21b327b2cfb4461aae281b0359e80994.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/fad234b8a5eb41f9bb6ebf585aa414c4.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/9355d5aaf7ad484e8231e959141f5d68.png" />
- 4
问以下哪种情况中，二极管会导通（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/1d8326d70c244520af9c0fd6bf2353dd.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/e4f28120e72749ebb894cca4eff7ad03.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/a5498ed9ea08463b96371ce6c7d534b0.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202103/915c1f30c89349f789e254686dc993ee.png">