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【单选题】
钢筋和混凝土两种材料能有效结合在一起共同工作，下列中哪种说法不正确（ ）。A.
钢筋与混凝土之间有可靠的粘结强度
B.
钢筋与混凝土两种材料的线膨胀系数相近
C.
钢筋与混凝土都有较高的抗拉强度
D.
混凝土对钢筋具有良好的保护作用
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C.
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【单选题】If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and【C1】______in bed until the early hours of...
A.
turning
B.
rolling
C.
twisting
D.
rotating
【简答题】阅读表达 If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and turning in bed until the early hour...
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