问题
填空题
亚共析钢的室温组织由（）构成。
答案
参考答案：铁素体和珠光体
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亚共析钢的室温组织由（）构成。
参考答案：铁素体和珠光体
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| Singing songs is fun, but is it useful for learning English? A foreign teacher Joe thinks singing songs is the most useful _1_ for students to learn pronunciation and students can learn some new _2_ at the same time. Joe has used songs to help __3_ learn several languages like French, Spanish, Japanese and Chinese. _4_ we can do the same thing. I think singing English songs is not only very useful but also very _5_ .Singing songs can help students _6_ English better and they are happy to learn more and more. Some vocabulary in the songs is not everyday English, so the teacher should be careful when using the lyrics (歌词) to _7_ students. The teacher should make the words 8__ to remember. When students can sing the song _9_ looking at the lyrics, they have learnt something that they will never 10__ !
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