空调系统中，新风量是多一些好还是少一些好？为什么？

通常希望放大器的输入电阻及输出电阻是高一些好还是低一些好？为什么？

为什么有些地方选用套管式换热器，水浸式换热器，而另一些地方选用列管式换热器？

在台湾地名中，有一些地方以“围”为地名的，请问这是为什么？（）

A:出于安全考虑 B:因为围垦土地 C:筑坝防止海水

在台湾地名中，有一些地方以“股”为地名，如“五股”、“七股”，请问这是为什么？

采用一夹一顶车削细长轴时，为什么要用弹性回转顶尖而夹紧端的夹紧长度为什么要短一些

庄稼需要肥料，石灰不是肥料，可是有些地方的农民为使庄稼长得好，往往向田里撒一些石灰，这是为什么呢？还可以用什么方法来代替撒播石灰？

石灰主要成份Ca(OH)₂，向田里撒石灰是为了中和土壤的酸度，改善酸性土壤，使土壤适合农作物生长。还可以用水灌溉。

没有感恩就没有真正的美德( No thanksgiving would be no virtue)。如今社会上一些人缺乏感恩之心，少数人甚至在父母年老体弱时都不愿意赡养。

请结合自己的实际，谈几点父母值得你感恩的地方，以及将来你会做些什么来报答父母的养育之恩。

1.短文的开头已给出，但不计入总词数。

2.100词左右。(感恩: thanksgiving)

Not only do our parents give us life, but they also give us endless love and support, always sharing our happiness and sorrow.

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Not only do our parents give us life, but they also give us endless love and support, always sharing our happiness and sorrow. I’m very grateful to my parents. They give me so much love and spare no efforts to support me. I still remember once I was seriously ill, they were so worried and almost kept me company the whole night. Now I’m a Senior High School student. Luckily for me, my parents can understand my stressful condition and often communicate with me with encouraging words. Furthermore, they give me enough personal space, which I appreciate so much. What I should do now is to study hard. When I grow up, I will try my best to make my parents live a happy life.