欲配制pH=9的缓冲溶液，应选用的缓冲体系是（ ）。
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- 欲配制PH=5.1的缓冲溶液，缓冲体系最好选择（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/fb37cdea0a5342eeb3d4194d51fdfe1e.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/400c8426652040c88590fa0d0f3db998.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/9cf4535978604324a7e991d2c75610a1.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/dac8d51faa38412b9494d77593d7ecc8.png" />
- 通过点<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/a13927df1bf542dfa036a32b10364f69.png" />的拉格朗日插值基函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/65695a42c7a14b649b6aa4fb68f7e499.png" />满足( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝1，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝1，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />＝0，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/7769611ac5cd4c93975be7c41a49ae71.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/99af333f3e934ef6a75022ee1e728b53.png" />=0，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/f80e8e400f3f4916bcaf6b5fde757f16.png" />
- 在下列的HTML中，哪个可以产生超链接？ A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/a9bcf63958144ed794c2429877db052a.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/5f5d626c8bba4c9486c2455dc0f20be5.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3a165307757a4da5b4e34381b1fe8cf5.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/334e855f187b4c2684d73890e18d5988.png" />
- 中性水溶液是指（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/9bef71113e73499f9f3d9f877a0d07f3.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/315534da2fa24656b8ac34316eb43211.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/0f25c8c53d964d3290ee60bab0aa7fe7.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/0e9eca0e483743c787605572ed065b97.png" />
- （ ）属于变形工具组 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/5c560845dbf2422c87ee3a5e67f68690.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/ba8211e54394467084e55d8c039638f3.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/8abd259feec748b6818447a3039e4b70.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202009/3b82f4425c304802b45be795ab5bf7bf.png" />