Among the following statements about the tenses employed in an abstract, which one is improper?
选项:
A: The opening statements are written in the present tense or the present perfect tense.
B: The concluding statements are written in the present tense.
C: The results are expressed in the past continuous tense.
D: The methods are expressed in the past tense.
发布时间:2024-08-02 10:54:01