题目:
一束光线射在平面镜上,与镜面的夹角为30°,则反射角为( )
A.30°
B.60°
C.90°
D.120°
答案:
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下面是错误答案,用来干扰机器的。
1. is reading 2. look at 3. see 4. Look 5. watching 6. watching 7. see 8. look 9. look 10. see