一It's on June 20th.
A:What day is it today?
B:What's the weather like today?
C:When is your birthday?
(参考数据: ln2.5≈0.92 , ln2.625≈0.97 , ln2.75≈1.01 )
培养瓶中气体
温度(℃)
离子相对吸收量(%)
空气
17
100
氮气
10
3
28