宝春

各位同学们，为了督促帮助大家持续提升英语能力，培君老师们特意给大家准备了托福每日一包。每天覆盖听说读写内容，坚持完成两周以上，就能见到自己的英语能力不断上涨哟。

1.听写包 答案：

Wow! Does that just go for mice?

Apparently not. Similar results have come from experiments on other animals from roundworms to most recently Rhesus monkeys.
Theses monkeys, two groups of them, were give all the vitamins and minerals and other nutrients they needed, except that one group got 30% fewer calories.
And now after 30 years or so, about an average lifetime for a monkey,
it’s clear that the monkeys that have been on the calorie restricted diet are doing a lot better than the ones on that we consider a normal healthful diet.
Like in terms of blood pressure and lots of other measures,
the calorie-restricted monkeys are much healthier and they just look and act younger than the monkeys in the normal diet group.
And as a group, they are living longer.
Interesting. But what’s the connection?
Oh, with the immune system?
Well, it’s been shown that the immune system becomes much less effective as animals age.
That’s true in humans too, we think those naive T-cells just get used up, I mean it is not like the body’s always making lots of new ones.
And over the course of a lifetime, as T-cell encounter more and more strange bacteria or whatever, the naive T-cells get turned into memory T-cells.
哇，这个结果只适用于老鼠吗？
显然不是。用其他动物从蛔虫到最近的猕猴所做的实验都得出了相似的结果。
这些猴子被分成了两组，得到了它们所需的所有维他命和矿物质以及其他的营养物质，只不过一组少得到了30%的卡路里。
在30年左右后，也就是大约一只猴子的平均寿命，
很明显看到那些按照卡路里限制食谱进食的猴子比那些按照我们认为是普通的健康食谱进食的猴子活得好得多。
在血压和很多其他标准中，
卡路里限制的猴子要健康得多，而且它们比普通饮食组的猴子看起来更年轻，行为上也更年轻。
它们一整个小组活的时间都更长。
很有趣，但是有什么联系呢？
哦，和免疫系统有什么联系吗？
研究显示，随着动物变老，它们的免疫系统会变得不那么有效。
这在人类身上也是一样。我们认为那些幼稚型T细胞被耗尽了，我是说，身体不是一直都会制造很多新T型细胞的。
在一生中，随着T细胞遇到越来越多的陌生细菌或者随便其他什么细胞，幼稚型T细胞会变成记忆性T细胞。

2.阅读包答案：

因此，我们需要采取措施使人们意识到如何合理使用网络。

3.写作包答案：

Air quality not only matters to the living quality of mankind,but also influences other lives on the earth.Therefore, we should consciously protect the environment, keep improving the air quality and raise the living standard of mankind.With the continuous development of industry and transportation, plenty of harmful substances have been released to the air,which threats residents，health.Therefore, it is especially important to prevent and deal with air pollution and to control the release of pollutants.Plants，especially woods，can filter air pollutants out and purify the air.So afforestation is a comparatively cost-effective measure to prevent and deal with air pollution.