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【单选题】
随着含碳量的增加，铁素体的量在( )。A.
减少
B.
增加
C.
不变
D.
不确定
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举一反三
【单选题】______ is known to us all is that maths is one of the most difficult subjects. [ ]
A.
As
B.
That
C.
It
D.
What
【单选题】The maths problem is so difficult that ____ of us can work it out.
A.
nobody
B.
no one
C.
all
D.
none
【简答题】按要求改写下面句子。 1. Help was often given to him by us. (改为主动语态) We often him . 2. Maths is more difficult than any other subject. (改为同义句) Maths is the difficult all the subjects. 3. I have written to him fo...
【单选题】中国位于（ ）
A.
东半球，北半球；亚洲东部；太平洋西岸；中低纬度
B.
东半球，南半球；亚洲东部；太平洋西岸；中高纬度
C.
西半球，南半球；亚洲西部；太平洋东岸；低纬度
D.
西半球，北半球；亚洲西部；太平洋西岸；高纬度
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