99. Periodic publications notifying changes in，or additions to，previously published navigational data are ________.
举一反三
- 139. Periodic publications notifying change in, or additions to, previously published navigational date are ______
- 气相色谱用高纯级气体的纯度为( )以上作载气。 A: 99% B: 99. 9 % C: 99. 99% D: 98%
- In the _______________(领域,范围)of research, it is an accepted fact that scientific publications have to be written or translated into English to get published, acknowledged, and cited.
- II. Complete each of the following sentences after the model with the word or phrase in brackets. Make changes or additions where necessary.
- 1.3 Complete each of the following sentences after the model with the word or phrase in brackets. Make changes or additions where necessary.