Is it true that light travels in a straight line and never _
| Is it true that light travels in a straight line and never _____ ____ it hits something that reflects it. |
| [ ] |
| A. turns; until B. bends; unless C. breaks; when D. changes; until |
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light travels 是什么意思?光年的英语单词是什么?
1年前7个回答
你能帮帮他们吗