Among the following statements about the tenses employed in an abstract, which one is improper?
选项:
A:The methods are expressed in the past tense.
B:The results are expressed in the past continuous tense.
C:The opening statements are written in the present tense or the present perfect tense.
D:The concluding statements are written in the present tense.
发布时间:2024-06-29 16:57:26