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【单选题】
As a result of the enclosures of the 17th and i8th centuries,A.
people were no longer legally entitled to own land
B.
people were forced to look elsewhere for means of supporting themselves
C.
people were not adequately compensated for the loss of their land
D.
people were badly paid for the work they managed to find
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【简答题】细胞学说的创始人是 和 。它的主要内容有1 ;2 ;3 。
【简答题】我记得几年前曾见过他。
【单选题】改变水泥各熟料矿物的含量，可使水泥性质发生相应的变化，要使水泥具有较低的水化热应降低( )含量。
A.
C 3 S
B.
C 2 S
C.
C 3 A
D.
C 4 AF
【多选题】改变水泥各熟料矿物的含量,可使水泥性质发生相应的变化,要使水泥具有较低的水化热应降低( )含量。
A.
硅酸三钙
B.
硅酸二钙
C.
铝酸三钙.
D.
铁铝酸四钙
E.
氧化钙