每个洗手间手盆的下面有一个浮动活门，其作用为防止客舱空气压力通过排水管泄露，洗手盆堵塞时，通过拉起活门顶部的圆环，可以超控排水。
参考答案：对
用所给单词的适当形式填空
1. He likes __________ to the park with his friends.(go)
2. Don't worry. We still have __________ time left.(little)
3. There are three __________ in our class. They speak English.(America)
4. Li Lianjie is a Chinese movie star. But now he is in Hollywood. He can speak __________ and __________.(China, England)
5. We are all Chinese. We all come from __________.(Chinese)
6岁女孩，诊断为肾病综合征，用泼尼松10mg，qid，治疗20天，尿量正常，水肿减轻，尿蛋白转为阴性，
住院4周时，患儿出现发热、咳嗽，尿量减少，加用青霉素治疗咳嗽减轻，但水肿越来越明显。检查结果回报：尿蛋白+++，尿红细胞4～6个／HP，白细胞0～3个／HP，C39.5g／L。该患儿此次复发最可能的原因是（）
A.劳累
B.治疗不正规
C.药量不够
D.血栓形成
E.感染
