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问题 单项选择题

一个局域网中某台主机的IP地址为176.68.160.12，使用22位作为网络地址，那么该局域网的子网掩码为（），最多可以连接的主机数为（）。

最多可以连接的主机数为（）

A．254

B．512

C．1022

D．1024

答案

参考答案：C

单项选择题

急性胰腺炎治疗中对糖皮质激素应用所采取的原则是（）

A.为减轻水肿、缓解疼痛可用

B.为对抗应激状态可适量应用

C.仅用于出血坏死型伴休克或成人呼吸窘迫综合征者

D.为减少局部并发症发生可选用

E.确诊为出血坏死型者均需酌情应用
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单项选择题

If you often feel tired and the doctor can’t find anything wrong with you, you may be in a state of Subhealth (亚健康). Subhealth is a state between health and illness. Most of the subhealthy people are middle-aged ones who are usually stressed out because of work and family. And some of them are students who are having exams.
If you are subheahlty, it is not difficult for you to become well soon. You should have good living habits. For example, you should get up early and go to bed early. And you should exercise regularly. Exercising can keep you healthy. As for meals, it is better to eat less salt and sugar. Vegetables, fruit and fish are important to your body. You should eat more of them. It is not good to eat too much at one meal, because it may cause unhealthy changes in the digestive tract(消化道). And at last, a balanced diet is very helpful in staying away from subhealth.

If you want to have good living habits,

A. you need to get up early and go to bed early
B. you should exercise very often
C. you should eat less salt and sugar and eat more vegetables, fruit and fish
D. All above
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