(White and black) light, (if mixing) (in) the right proportion, (will show) us g

游客2025-03-13 11

问题 (White and black) light, (if mixing) (in) the right proportion, (will show) us grey.

选项 A、White and black
B、if mixing
C、in
D、will show

答案 B

解析应改为if mixed。应用过去分词mixed表示被动。

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