用吸收管吸收采集空气样品，应使用（）的吸收管。
A、阻力合格
B、外观合格
C、气密性合格
D、发泡试验合格
参考答案：A, B, C, D
_____, she is the sort of woman to spread sunshine to people through her smile. [ ]
A. Shy and cautious
B. Sensitive and thoughtful
C. Honest and confident
D. Lighthearted and optimistic
让学生多参加兴趣班，多学吹拉弹唱，就能实现素质的提升，就是素质教育。
