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E1载波的数据速率是（45）Mb/s，T1载波的数据速率是（46）Mb/s。 46（）
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在西方，对独生子女的看法有两种不同的观点，一是消极悲观的观点，二是积极乐观的观点，（ ）处于主导地位。
TCP协议使用（57）次握手机制建立连接，当请求方发出SYN连接请求后，等待对方回答（58），这样可以防止建立错误的连接。 58（）
Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamin-enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins were.In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria feeding arrangement, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in, We are told that at first they showed some unusual eating patterns, but that over a period of time they managed to select well-balanced diet.So, in selecting food, rats and babies do seem to know and act on what’s best for them. Apparently, there is a kind of "body wisdom", which humans soon lose. Most of us do not eat as wisely as we could. Many of our food preferences are culturally determined and influenced by long-established habits. Some people eat foxes, dogs and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seems to be greatly influenced by what is going on around them. The author implied ih the passage that most of us （）
德育的特点主要有（ ）
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