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问题 单项选择题

患儿，男，1岁。素不欲食，强迫进食则脘腹胀满，舌苔白腻，脉细缓。其诊断是

A．厌食，胃阴不足证

B．厌食，脾运失健证

C．厌食，脾胃气虚证

D．疳病，疳证

E．疳病，疳积

答案

参考答案：B

单项选择题

Even though current technologies make the ultimate segmented network impractical, new technologies and products hold the promise of making the concept a reality. Most important of all these new technologies are (66) . The ultimate switched LAN, which is technically possible, now, exhibits the following characteristics:

1. High-speed yet cost-effective switching devices can be implemented on a wide scale, providing dedicated connections for individual users and supporting the aggregate (67) of all networked users.

2. The ability to deploy switching capabilities incrementally into the (68) base. Switching implementations support switching of individual users or groups so that existing users of shared media modules can continue to use the existing equipment until they can justify moving to dedicate switched LAN connections.

3. Support and enhancement of existing routed environments. Switching (69) routint, but rather can be introduced into the network without making any changes to the existing routing equipment or configuration. (70) play a critical role in the integration of switching into existing networks.

（66）（）

A.device

B.distributed

C.installed

D.integrated
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单项选择题

关于反冲洗滤层膨胀率公式e=（L-LO）/LO下列说法错误的是（）。

A.e是膨胀率

B.L是反冲洗时稳定层厚度

C.L是反冲洗时流化滤层厚度

D.LO是过滤时稳定层厚度
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