下面化合物中,哪一个是β-D-(+)-葡萄糖的对映体?( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/002f6b8b00754e73a0a765bed3379ad1.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/4f088c46a4554104b071fda2f3bd0e50.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/07afad29f33b414fb995ec4cfb02b15f.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/658936488ee044a4b8534d46c8e326c4.png" />

下列各异构体中,不与硝酸银醇溶液反应的是( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/46ab1ae1e6fe430ab111f6290f7512d1.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/af681729166e44959bb2a370fe9508e7.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/222ba03c8356460ab14728eccacc1069.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/7f1ef807f4b14ce6bf2fdaf1db046e9a.png" />

化学法鉴别吡啶和α-甲基吡啶,加入( )。 A: HCl B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/ec29052bf35b43e3ba0473b5cfc6ec40.png" />溶液 C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/ba750919b17e4897b04acbfd77854c18.png" />溶液 D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/970b9de687064f8084c971a3335c249b.png" />

某烯烃经臭氧化和水解后生成等物质的量的丙酮和乙醛,则该化合物是( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/9fb3472e844a48a99a2db45640eaef08.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/0717ba3f71794e4dbb99b43455aed142.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/2d4264ce3bdc4bc3a83dd280615ef4aa.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/bb705638a6d647519bcd62c35af9d5c8.png" />

图示结构，汇交于结点A各杆端的力矩分配系数为：（）<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/d8fb108baf5043489469508c124eabc9.png"> A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/71af4aae8d3c4cc3a8236715c02d8dd0.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/ccfc76583f3a4a17a1b8ae5d350c35c7.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/0f214a006bf64228879035c5c64fba2a.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/f6e2d4cb58c943b19e51aa37b929a34d.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/7b66a4d0913142fabfdc2805b2971ecb.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/54e6491e78754550be4f562e0849acd0.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/115a0df0ea124266ae250912e8b572a1.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/b686ba286d90499a9729e57a8fea8e32.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/5c1a3965cc7245a0a9bca5f2eae645bf.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/3b342699d2aa451d9a227dff4928c65f.png">,<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202007/1d9ea5da536a4f18bd677cead25f28b2.png">