生日七年級作文500字

生日七年級作文500字

　　閱讀段落

　　Nevertheless, demand for flat glass was very high and glassmakers across the world were looking for a method of making it continuously. The first continuous ribbon process involved squeezing molten glass through two hot rollers, similar to an old mangle. This allowed glass of virtually any thickness to be made non-stop, but the rollers would leave both sides of the glass marked, and these would then need to be ground and polished. This part of the process rubbed away around 20 per cent of the glass, and the machines were very expensive.

　　段落大意

　　本段介紹了為了滿足需求而新出的制造玻璃的方法及其效果和存在的問題。

　　閱讀筆記

　　Method of making glass continuously:first continuous ribbon process

　　1. means: squeezing molten glass through two hot rollers

　　2. effect: non-stop making of thin glass

　　3. problem: rollers leave marksgrind and polish the marksrub away 20% glass  expensive machines

　　邏輯關系

　　1. 對比

　　The process took a long time and was labour-intensive.

　　Demand for flat glass was very high and glassmakers across the world were looking for a method of making it continuously.

　　2. 對比

　　This allowed glass of virtually any thickness to be made non-stop.

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