By coincidence, oil paints were developed at the time when technique of perspective was used.
A. a ; the B \ ; a C. \; the D. a; a
By coincidence, oil paints were developed at the time when technique of perspective was u
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解决时间 2021-03-23 00:38
- 提问者网友：我是女神我骄傲
- 2021-03-22 01:12
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- 五星知识达人网友：街头电车
- 2021-03-22 02:28
解析：考查冠词。第一空的固定词组by coincidence偶然；第二空特指透镜，望远镜的技术。故C正确。
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- 1楼网友：酒醒三更
- 2021-03-22 03:56
我好好复习下
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