问题
单项选择题
FTTH入户段光缆敷设完毕后，为确保该段光纤（含光纤机械接续连接插头）的衰减值小于（）
A.1.9dB
B.1.6dB
C.2.1dB
D.1.5dB
答案
参考答案：D
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FTTH入户段光缆敷设完毕后，为确保该段光纤（含光纤机械接续连接插头）的衰减值小于（）
A.1.9dB
B.1.6dB
C.2.1dB
D.1.5dB
参考答案：D
| 单词辨音。 | |||
| ( )1. A. cake ( )2. A. Internet ( )3. A. bike ( )4. A. comic ( )5. A. music ( )6. A. later ( )7. A. foot ( )8. A. chair ( )9. A. great ( )10. A. English | B. gate B. pretty B. sign B. some B. use B. over B. room B. watch B. bread B. morning | C. camera C. yellow C. twin C. mother C. excuse C. her C. look C. school C. breakfast C. evening | D. take D. very D. white D. colour D. must D. newspaper D. cook D. teacher D. sweater D. sing |