皮皮学，免费搜题
登录
搜题
【单选题】
某方波信号的周期T=5μs，则此方波的三次谐波频率为（）A.
10 6 Hz
B.
2 × 10 6 Hz
C.
6 × 10 5 Hz
D.
2 × 10 5 Hz
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
【单选题】Once a class does not need to move at a _____ pace, students can learn different things rather than all learning the same thing.
A.
frequent
B.
hasty
C.
uniform
D.
settled
【判断题】In the brainstorming session, students can list all the ideas related to the topic on a piece of paper or on the blackboard. Some ideas may be useful, while others may not. But this does not matter at...
A.
正确
B.
错误
【简答题】轴应具有良好的结构工艺性,需磨制的轴段应设 ,需车制螺纹的轴段应设 。
【判断题】In the brainstorming session, students can list all the ideas related to the topic on a piece of paper or on the blackboard. Some ideas may be useful, while others may not. But this does not matter at...
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
