149、《致橡树》的作者是( )。

34、A ( ) is generally understood as a basic unit of a paper.

33、We should employ ( ) language in research papers.

32、The expression ( ) indicates logical relationship.

31、We can use ( ) to summarize or conclude.

30、Which expression is different from the other three?

29、Which expression is not a transitional one showing addition?

28、The repetition of syntactically similar constructions of coordinate sentences or phrases is called ( ).

27、When you report the result of research, use the ( ) tense to describe the result of a particular experiment.

26、Which one does not belong to judgemental language?

25、( ) can appear in research papers.