皮皮学，免费搜题
登录
搜题
【判断题】
如果将时域图经过快速叶变换（FFT），就能在计算机显示器上显示出频域图，也称频谱图，它的横坐标为频率f，纵坐标可以是加速度，也可以是振幅或功率等。频谱图反映了在频率范围之内，对应于每一个频率的振动分量的大小。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】水质的好坏对饮料品质影响很大,评价水质一般有( )、( )、 ( )、( )、( )、( )( )、( )。
【单选题】— Did you forget about our wedding anniversary ? — _____ I've booked a table at Michel's restaurant for this evening. [ ]
A.
What ten?
B.
I'm afraid so.
C.
How could I?
D.
For sure.
【单选题】—May I remind you that Mr. White is waiting outside, Mrs. Green? —Oh, I _________ all about it.
A.
forget
B.
had forgotten
C.
forgot
D.
was forgetting
【简答题】What is intelce anyway? When I was in the army I 21 an intelce test that all soldiers took, and, against 22 of 100, scored 160．No one at the base had ever seen a figure like that, and for tw...
【简答题】完形填空 This little story I'm about to tell you happened when I was 11 years old, and I'll never forget it. It was at my friend Jenny's house after 1 one day, and we were doing our homework. While I was ...
【简答题】常见的夹紧机构有: ___________________ 、 ___________________ 和 ___________________ 。
【简答题】“Green Mountains”环保公司招聘HR assistant 一职,请给该公司的人事经理Aline Li写一封求职信表示求职意愿。 内容: 1. 说明你从何处得到招聘信息; 2. 简单介绍个人情况:XX岁,毕业于XX学院,XX学历,主修XX, 曾在XX公司担任过X年的人事助理工作,经验丰富; 3. 随信附上简历,期望与人事经理面谈。 请同学们根据以上信息,结合给出的英文求职信框架,完成下...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
