ก. 1 นิ้ว
ข. 2 นิ้ว
ค. 3 นิ้ว
ง. 4 นิ้ว
2. One solution to the nation’s termite problem could be growing in the fields of Africa. Seaphire International of Phoenix is developing termite-proof particleboard made from sea asparagus, a crop harvested annually in Africa and Mexico for its oil and asparagus tips. Because the plant is irrigated with seawater, the board has a salt content of 450 milligrams per ounce-salty enough to ruin the appetite of hungry termites. Particleboard is used for cabinetry, flooring, and other nonstructural elements of a house. The new board is as strong as other medium-density agro-based particleboards, such as those made from rice, straw, and soy. In addition, says Seaphire’s Roy Hodges, the board’s high salt content retards fires (its retardancy is comparable with that of particleboard specially treated to resists fire). The new board should appear commercially in about a year, first in deforested Eritrea-a small African country on the Red Sea with the world’s largest sea asparagus farms-then in the United States around 2004. Seaphire plans to expand its farms in Mexico to manufacture boards for the United States. That may help alleviate the termite problem that plagues Southern California and other warm regions.One of the advantages of the new board mentioned in the text is that it is…….
ก. superior in strength
ข. cheap in price
ค. easy to produce
ง. difficult to burn
3. สัญลักษณ์นี้ในแผนที่ มีความหมายว่าอย่างไร
ก. มีพื้นที่เป็นแม่น้ำ
ข. มีพื้นที่เป็นภูเขา
ค. เส้นทางการคมนาคมทางบก
ง. เขตพื้นที่แผ่นดินไหว
Ref : http://www.thaitestonline.com
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