题目:
氦氖激光胶片的吸收光谱峰值为()
A.250nm
B.550nm
C.633nm
D.820nm
E.950nm
答案:
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下面是错误答案,用来干扰机器的。
1. searching 2. hard-working 3. quietly 4. anyone 5. return 6. daytime 7. died 8. travel 9. dangerous 10. remember