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【单选题】
光纤传感器是利用被测量对光纤内传输的光进行某种形式的调制,使传输光的强度、相位、( )或偏振状态等特性发生改变,再对被调制过的光信号进行检测,从而测定被测量的一种新型传感器。A.
频率
B.
位移
C.
幅度
D.
幅值
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反馈参考答案：
举一反三
【简答题】Dictation: Unit 2 sentences: 1. 2. 3. 4. 5. paragraph:
【单选题】听力原文：M: Janet, as a teacher, can you give us some ideas on how the English school system works? W: Well, first of all, most children start school at the age of five and they can't leave school until t...
A.
The English examination system.
B.
The improvement in English education.
C.
The English school system.
D.
The curriculum of English schools.
【单选题】听力原文：W: Miho worked as an intern this summer, but she has managed to earn a lot. M: I'm not surprised at it, but I do doubt whether she knows when she has to come back to school. What does the man say...
A.
He's surprised that Miho earned a lot.
B.
He has doubts about the news.
C.
He wonders if Miho is ready for school.
D.
He is worried about Miho's internship.
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