【判断题】【消耗次数：1】
电子能级之间的跃迁产生的光谱称为电子光谱，在红外区。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
红外光谱法中的红外吸收带的波长位置与吸收谱带的强度, 可以用来
①
鉴定未知物的结构组成或确定其化学基团及进行定量分析与纯度鉴定
②
确定配位数
③
研究化学位移
④
研究溶剂效应
随机题目
【单选题】
Peter: It’s such a nice warm day. I think I’ll go out for a walk. Dave: ____
①
It is warm to take a walk.
②
Yes. It is warm today.
③
I’d like to join you.
④
Yes. Everybody likes this weather.
【单选题】
5. ____ the bad storm Tom delivered the newspapers on time.
①
In favor of
②
In spite of
③
In front of
④
In charge of
【单选题】
Was it until the1990s ____ the old man finally got a house of his own?
①
when
②
that
③
which
④
how
【单选题】
____ the math problem is difficult, Ill try very hard to work it out.
①
Though
②
When
③
Before
④
After
【单选题】
When you meet someone who ____ deeply about something, you probably will want to ask them why they do so.?
①
absorbs ?
②
cares ?
③
considers ?
④
minds?
【单选题】
Theory is based on practice and in____ serves practice.
①
turn
②
tone
③
tune
④
practice
【单选题】
When I got there, Henry ____ to the hospital.
①
had been sent
②
would send
③
was sent
④
would be sent
【单选题】
The engineers are going through with their highway project, ____the expenses have risen.
①
even though
②
just because
③
now that
④
as though
【单选题】
A police officer claimed he had attempted to ____ paying his fare.
①
avoid
②
reject
③
refuse
④
neglect
【单选题】
The students were not____ to leave the classroom without an adequate reason.?
①
permitted ?
②
remitted ?
③
admitted ?
④
emitted?