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随动系统是指 :
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皮皮学刷刷变学霸
举一反三
【简答题】( )建筑圆盖方趾,蕴涵天圆地方之说,原是佛教对世界的一种认识。
【简答题】--- This book isn't suitable for children, is it?--- _______. It's bad for children.A. Yes, it is B. No, it isn't C. It is D. It isn't
【单选题】This book isn't well written. I don't think it worth ___ .
A.
to buy
B.
to be bought
C.
buying
D.
being bought
【简答题】金属材料在生产、生活中的应用广泛． （1）2010年上海世博会中国馆——“东方之冠”的主体结构为四根巨型钢筋混凝成的核心筒．下列有关钢的说法正确的是 _________ （ 填序号，下同）． a．钢是纯铁 b．钢属于金属材料 c．钢比生铁的含碳量更高 （2）金属活动性顺序表（填元素符号） K、Ca、Na、 _________ 、Sn、Pb、（H）、Cu、Hg、Ag、Pt、Au （3）将27g铝...
【单选题】This book isn't mine. ________ can it be? [ ]
A.
What else
B.
Who else
C.
Which else's
D.
Who else's
【简答题】C: This book isn't my cup of tea.D:_________________________C: I don't like it very much.
【单选题】--- This book isn't suitable for children, is it? --- ______. It's bad for children.
A.
Yes,it is
B.
No, it isn't
C.
It is
D.
It isn't
【单选题】( ) This ______ a book . _________ a pencil case . A. is ; It's B . isn't ; This C. isn't ; It's
A.
is ; It's
B.
isn't ; This
C.
isn't ; It's
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