21.It is known to all that gunpowder is ___ Chinese inventio
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解决时间 2021-07-31 20:49
- 提问者网友：绫月
- 2021-07-31 02:47
21.It is known to all that gunpowder is ___ Chinese invention,as is the compass,___ instrument that you use for finding directions.A.a; the.B/; an C.a;an D./;the
最佳答案
- 五星知识达人网友：轮獄道
- 2021-07-31 02:57
C.a;an
刚提及,用不定冠词
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