皮皮学，免费搜题
登录
搜题
【单选题】
已知正弦稳态电路如图所示,若 u s =10cos(2t+30 0 )V ,则电流 i 与电压 u s 的相位关系是( )。A.
i 滞后 u s 90 ⁰
B.
i 超前 u s 90 ⁰
C.
i 滞后 u s 45 ⁰
D.
i 超前 u s 45 ⁰
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】Li Bai was a great p___ with great talent.
【单选题】When the sun comes out the flowers ______ by opening wide.
A.
act
B.
react
C.
interact
D.
active
【单选题】According to John P. Caskey, pawnshops are important because ______.
A.
they provide great dollar value to the poor
B.
they make big loans
C.
they are serving the majority of the population
D.
they make a large number of loans to the poor
【单选题】How many hours will the applicants work each week?
A.
16 hours
B.
18 hours
C.
20 hours
D.
24 hours
【判断题】The writer has interviewed many applicants for jobs, so he has abundant experience in how to get the job you want.
A.
正确
B.
错误
【单选题】There is a great deal of evidence ________ that music activities engage different parts of the brain.
A.
indicate
B.
indicating
C.
indicated
D.
to be indicating
相关题目：
参考解析：
知识点：
题目纠错 0
发布
