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简述使用中草药饲料添加剂要考虑的几个主要问题。

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约定离婚后经过一定期限再复婚，这样的协议有法律约束力吗？

You install 10 USB tablets on 10 Windows 2000 Professional computers with built-in USB controllers. After installing the tablet software， you notice that the tablets cannot communicate with the computers. What must you do to recover from this problem？（）

A. Enable the USB root hub controller and reinstall the USB tablet device drivers.
B. Disable USB error detection for the USB root hub controller and enable the USB tablet within the Device Manager.
C. Reinstall the USB device drivers and disable USB error detection.
D. Enable the USB ports in the BIOS and reinstall the USB tablet device drivers.

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碳氮比（C／N）

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患儿男，9岁，扁桃体炎2周后出现水肿、少尿，尿色似"冰红茶"，3天后出现无尿、头晕、头痛，急诊入院。体检：体温37.8℃，血压146/98mmHg，精神烦躁，眼睑及双下肢水肿明显，尿检：蛋白1+，红细胞130～200个/HP，白细胞20～30个/HP。目前首要的处理是（）。

A. 抗感染
B. 退热
C. 抗凝
D. 利尿、降血压
E. 扁桃体切除
F. 止疼

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