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【单选题】
Tim ____since he lost his job three weeks ago.A.
had been unemployed
B.
was unemployed
C.
has been unemployed
D.
has unemployed
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】This book is well written, _______ .
A.
with special attention paid to written English
B.
with special attention paying to written English
C.
special attention is paid to written English
D.
paid special attention to written English
【判断题】玄关吊顶可以设计成自由流畅的曲线，也可 以是层次分明、凹凸变化的几何体，还可以是大胆 外露的木龙骨并悬挂绿意点缀……无论如何设 计，应将玄关的吊顶和客厅的吊顶结合起来考虑， 做到简洁、整体、统一、有个性。
A.
正确
B.
错误
【简答题】C-4 的标准输入比特率为( ),一帧由( )字节组成,相当于( ) bit , C-4 的信号速率为( )。
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