She is ___ newcomer to ____ chemistry but she has already made some important discoveries.A. a; / B. a ; the 选哪个,怎么分析的?

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She is ___ newcomer to ____ chemistry but she has already made some important discoveries.A. a; / B. a ; the 选哪个,怎么分析的?

She is ___ newcomer to ____ chemistry but she has already made some important discoveries.A. a; / B. a ; the 选哪个,怎么分析的?
She is ___ newcomer to ____ chemistry but she has already made some important discoveries.
A. a; / B. a ; the
选哪个,怎么分析的?

She is ___ newcomer to ____ chemistry but she has already made some important discoveries.A. a; / B. a ; the 选哪个,怎么分析的?
A
化学作为一门学科,无需特指,不加the.

A
chemistry 学科,不用冠词

A

A
泛指用a,学科一类名词前不用冠词

A
第一加定冠词,第2个抽象名词前不加冠词

A