关系查询语言根据其理论基础的不同分为哪两类？

Puppy Food

A puppy (young dog) is a precious addition to any family. The excitement of bringing home a little furry friend will always live in our memories. Like all of us, though, your puppy must have adequate nutrition（营养） right from the start to make certain that it’ll have a long and healthy life.

 小题1:  You might ask yourself what is the best for your new pet with all of the different varieties on the market in all of their attractive packaging. Some dry food produced specially for puppies is the best for the development of their teeth.   小题2: 

Contrary to the belief of many first-time puppy owners, it is not always the best idea to purchase food that is too high in calcium (钙), protein, and vitamin levels.   小题3:  In addition, a high intake of calcium is associated with bone disease in large-breed dogs. If you have a “small-breed” puppy, you can buy that kind of food.

It is not a good idea to feed the food you eat to your puppy frequently, as your puppy may become selective about food.   小题4:  Some people think that dog biscuits and other treats are fine, but they should not be a main part of puppy’s diet.

Young puppies should be fed three times a day. Each puppy is unique, however, so feeding them twice a day is acceptable. After ten to twelve weeks of age, feed your puppy twice per day. Allow your puppy to eat as much as he would like in fifteen minutes.   小题5:  If you let your puppy eat too much or too often by keeping food accessible at all times, he may become overweight and have health problems as an adult. Like humans, your puppy will not enjoy the food any longer if it is there at all times.

A．Pick up the dish with the remaining food.

B．Proper food is a basic necessity for your puppies.

C．Remember to give your puppy the food he would like to have.

D．It can also cause an upset stomach due to an unbalanced diet.E. A further benefit is that it is less expensive than the canned food.

F. One example is that extra helpings of nutrients do harm to digestive organs.

G. It’s good to provide the extra nutrients a puppy needs until he grows larger.

主扇运转管理方面有哪些规定？

音响系统带负载的能力利用（）表示。

A．信噪比

B．功率

C．频率

D．功效

局域网的网络硬件主要包括服务器、工作站、网卡和()。

A．传输介质

B．连接设备

C．网络协议

D．网络拓扑结构

企业法人领取《企业法人营业执照》后，停止经营活动满多长时间的，视同歇业( )。

A．3个月

B．6个月

C．1年

D．2年