可发生颈部淋巴结肿大的疾病有（）
A.扁桃体癌
B.鼻咽癌
C.肺癌
D.喉癌
E.肝癌
参考答案：A, B, C, D, E
补全对话。
A: What are you doing for vacation?
B: I'm going to San Francisco.
A: 1 . Who are you going 2 ?
B: I'm going with my family.
A: 3 ?
B: I'm going on the 11th.
A: 4 ?
B: I'm staying for a week.
A: How are you getting there?
B: I'm 5 a plane there.
A: I wish you a good trip.
B: Thank you.
防烟面罩（PBE）的使用时间为（）。
A.10分钟
B.12分钟
C.15分钟
D.18分钟
