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【简答题】
光纤的几个重要参数可分为____、____、____三部分组成。振幅传感器的优点是(结构简单)、(具有与光纤技术的相容性)和(信号检测也较容易),但是它的缺点是(灵敏度较低)。
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反馈参考答案：
举一反三
【单选题】As soon as _____ concert film 'This Is It' was released on October 28th, it became _____ great success in all big cinemas across the planet. [ ]
A.
a; the
B.
the; a
C.
the; 不填
D.
a; a
【简答题】试述空气滤清器的功用。
【单选题】Which sentence sounds more polite?
A.
“The rate was agreed to when the room was reserveD.”
B.
“This is the agreed rate – pay now.”
C.
“You agreed to this rate when you reserved the room.”
D.
“You signed for this rate so that is final.”
【单选题】Which of the following sounds more informal and more natural?
A.
Get together.
B.
Meet.
C.
See.
【单选题】Which sentence sounds more professional?
A.
“How may I assist you today?”
B.
“Service?”
C.
“What do you need, sir?”
D.
“What do you want?”
【单选题】Which sentence sounds more professional?
A.
“Are you checking in?”
B.
“Are you in?”
C.
“Checking in?”
D.
“Reservation?”
【简答题】被称为“几何之父”的是（）
相关题目：
【单选题】Which of the following sounds more informal and more natural?
A.
Get together.
B.
Meet.
C.
See.
参考解析：
知识点：
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