Question 1
鼻腔中的毛状结构和黏液有什么主要功能?
- A湿润吸入的空气
- B过滤灰尘和细菌
- C产生嗅觉
- D进行气体交换
Answer: B. 过滤灰尘和细菌
鼻腔内的毛状结构(鼻毛)和黏液主要用来过滤吸入空气中的灰尘和细菌,保护呼吸系统免受感染。
Standard 6 · 科学 (Science)
六年级科学 (Science) · 人类
Humans is part of the Standard 6 Science syllabus. Practice the MCQs here to sharpen your exam technique — each question comes with a worked explanation.
Free sample questions
Question 1
Answer: B. 过滤灰尘和细菌
Question 2
Answer: B. B
Question 3
Answer: C. 小肠
Question 4
Answer: B. 肾脏 → 输尿管 → 膀胱 → 尿道
Question 5
Answer: B. 脊髓
Other 科学 (Science) chapters
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