১,২০১.
The author refers to CD's as 'sandwiches' because they_____.
ব্যাখ্যা
Passage: Compact discs (CDs) have revolutionized the music industry with their surprisingly realistic sound. The six-inch discs look like thin plastics sandwiched with aluminum at the centre. They have digitally recorded material that is read by laser beams, so the sound has none of the crackling vinyl records. CDs are also virtually indestructible and they are lighter and smaller than conventional records. Since their introduction, CDs have become more affordable and widely available. In fact, they are now sold in electronics and video stores that didn't formerly carry records or cassettes. There has been a phenomenal growth in the sale of CDs since introduction. CDs have all but replaced records in stores and in spite of their being less affordable than cassettes; they continue to gain in popularity.
Explanation:
- Sandwich এ যেমন দুইটি layer বা স্তর থাকে, ঠিক তেমনি CD তেও Plastic এর সাথে aluminum এর একটি স্তর থাকে,।
- তাই ল্রখক CD কে Sandwich এর সাথে তুলনা করেছেন।
Explanation:
- Sandwich এ যেমন দুইটি layer বা স্তর থাকে, ঠিক তেমনি CD তেও Plastic এর সাথে aluminum এর একটি স্তর থাকে,।
- তাই ল্রখক CD কে Sandwich এর সাথে তুলনা করেছেন।