IELTS reading detail Practice
根據文章，逆滲透系統中薄膜的主要目的是什麼？
Question type: multiple choice · Difficulty: beginner
- A. A 加熱海水以產生蒸汽
- B. B 向水中添加必需礦物質
- C. C 阻擋鹽分子同時讓水分子通過
- D. D 將鹽水與海水混合
Explanation Preview
Paragraph C explains that the membrane 'contains microscopic pores that are large enough to let water molecules pass through but small enough to block the larger salt molecules'. This directly answers the question.