皮皮学，免费搜题
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【多选题】
以下属于招贴广告的有( )A.
商业招贴
B.
公益招贴
C.
文化招贴
D.
电影招贴
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】电动机变频调速系统主要包括异步电动机、( )、控制环节、负载及传动机构。A. 4
【多选题】____seemed to be a lot of difficulty in dealing with some many problems within a week. _____seemed that she was not interested in the topic they [ ]
A.
There
B.
It
C.
She
D.
They
【单选题】We shouldn't be __________any difficulties. [ ]
A.
angry with
B.
surprised to
C.
afraid of
D.
afraid to