下列化合物中哪个烯醇式含量最高?( )
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B:
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D:
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举一反三
- 哪个标记用于表示 HTML 文档的结束？( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/6c4425eb00dd44f2a456cd3fa4e18488.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/0db52a7ca0c0403d9f0e9f9784a1c655.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/0f4f1b4846f940448a74df9e286abc77.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/0dfd6a6c8d0f4ed2872185be16c2a849.png" />
- 下列化合物中哪个具有芳香性?( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/f459ad245e0b421b8c408034349962e2.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/bbd772711b5845fa810365b224ba5b78.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/b9e471ec661a474697375481122a9ae9.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/9f0b52aec3cd4bc8b4d0da7317a27903.png" />
- 下列计算结果正确的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/46a91374ddb244fab2b2569e4e5c76da.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/13eeb2611b584e26b3cfda4c59f5e808.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/a2d3bc6d966b4e1aa1de82ec98f49aad.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/bf909bdba7004c3782fd3041cf6a8768.png" />
- 下列四种环烷烃的燃烧热,哪个最大?( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/5be91d41d31b46d29452ee767404d3ee.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/2f2e0c6325944be08c159693eb20cb6a.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/0fe793ac8f0345ff832807bcc91a08b7.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202111/30e54f592a4d4081909d720eea5728c1.png" />
- 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" />