皮皮学，免费搜题
登录
搜题
【单选题】
在图示电路中 , 稳压管 VD Z1 的稳定电压为 9V , VD Z2 的 稳定电压为 15V ,输出 电压 U O 等于 ( ) 。A.
15V
B.
9V
C.
24V
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The ________ look on Miss White' s face told us that she was ________ great trouble.
A.
worrying in
B.
worried in
C.
worrying with
D.
worried with
【单选题】On the ground _______ the man, his face as white as a sheet of paper.
A.
lie
B.
lied
C.
lay
D.
laid
【简答题】在抗震设计中,计算结构地震作用时,采用的重力荷载代表值如何计算?
【单选题】What he said_____ so_____that I could hardly believe my ears.
A.
was; surprised
B.
was; surprising
C.
were; surprised
D.
were; surprising
相关题目：