下面元素中属于角元素的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/a84338df1066442f8fba407dc394bece.png"/>，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/7e678f64cbf546518cb40807c9535ab4.png"/> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/aa9bbef6c95c4ab98e516d1cddf38a18.png"/> C: μ，γ D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/e0e21467446a4959af4b97dee57e99f5.png"/>，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/58fb3862b2c5410d87a1fc88a68b969c.png"/>，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/eb181846a1a24e7e8e6b12ec8151d557.png"/>

矩阵<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/880363deee6b42bfa49ad16288f10309.png" />的Jordan标准形为 （ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/e751d71d146042418d4cf61c9ceb5978.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/d14f2641a5264f10ab7195978cf99c5f.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/37aad81cb46b4bcaa49af35dd1f23caf.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/7b7a8de2daa448339c85ae7956ab58ef.png" />

下列是共轭酸碱对的有（ ）。 A: HCN，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/6aec3656de5e43f2aac207f224124d37.png" /> B: HCN，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/ffd97cd52f844953af34d4991d6c9c95.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/46f8b3d5a93446d78f44b38ee72d1120.png" /> D: HF，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/059085cf7ba54f5d855b176195515ea5.png" /> E: HAc，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/7a138c6b212a4f7f99e5af8147384030.png" />

下列化合物中，属于芳香醇的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/bd968b6614554735b34bfc279c5d772c.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/6e41464b498a4c52b3f045647a129232.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/63bedd7ddf194421a3fbe2a4990ad80d.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/aa0a51c0dc7e44d7894063b3d84a7395.png" />

下列化合物中，键角最大的是 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/7d5e45fcea124c1ca0e2cac609646c36.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/34afa0e9237b41cebe5c997fb73f6719.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/bcf0c0d02f2e426189557d62c2177db4.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/3e6a04eb0baa41d285d1eebf96aa9965.png" />

下列化合物中，不属于芳香杂环化合物的是( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/a024e8d480fb4118a97ea91ba159a3cf.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/72e704ca592d436fa897071fb9261b8d.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/7b7b51f20ff24a5798b3d77318b5d460.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/fb3c6ac56961413ea1eff2f9c8fad647.png" />

下列分子或离子中键角最小的是 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/68d06a2f59344caaa4ca7366abce5f7b.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/28e2378437dd4675becb80d8df90c126.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/815898a63941430dbd7304f9e6ea5c6f.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/1e23f153d4664e689c4b4022807a02c0.png" />

自然指数衰减函数e-at的拉氏变换为( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/8737eea8f9ab4b57956966b78c81457a.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/e2e3d66540944a6abef22331e994afd3.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/d1f05087cb5641e59f6be5245adf2af2.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/333ade86887d4e3aa44332086c758e09.png" />

下列化合物中，能发生酰化反应的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/517de8a8f42942cf82859d6d49f675cf.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/6c8d89865ee24be78747d6fd25cd2d71.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/2483bc407db748cc96889b6112cbfb5c.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202109/cb06682ded43441d80d66a15e803c3b8.png" />

下列各组混合液中，能作为缓冲溶液的是 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/1e10f2f1a431462e88222763d65640a3.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/b52056f8df09413c8489eb141f56de09.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/3164abf6e70844aab1f60efd9e7f2908.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202109/d4368e897b7f4a7080eb2533804d3487.png" />