皮皮学，免费搜题
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【多选题】
下面哪个操作系统是嵌入式操作系统。A.
Red-hat Linux
B.
µCLinux
C.
Ubuntu Linux
D.
SUSE Linux
E.
Android
F.
Windows 7
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
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【简答题】简述凸轮设计中反转法原理?
【单选题】—Who is the little girl in the photo, Kate? —It’s me. The photo ten years ago.
A.
takes
B.
took
C.
is taken
D.
was taken
【单选题】一Who is the little girl in the photo, Kate? 一It’s me. The photo ten years ago.
A.
takes
B.
took
C.
is taken
D.
was taken
【单选题】Who is the awful little man?
A.
He is the person who is in charge of the parking lot.
B.
He is the person who always parks his car here.
C.
He is the author's friend.
D.
He is a clerk in the post office.
【单选题】( )—Who is the little girl in the photo, Kate?
A.
t's me. The photo ________ ten years ago.
B.
takes
C.
took
D.
is taken
E.
was taken
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