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[主观题]
It was in 1978______the Whites settled down in France.A.thatB.at the timeC.whenD.by the ti
It was in 1978______the Whites settled down in France.
A.that
B.at the time
C.when
D.by the time
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It was in 1978______the Whites settled down in France.
A.that
B.at the time
C.when
D.by the time
A.是一种表示塑胶材料加工时的流动性的数值
B.材料局部抵抗硬物压入其表面的能力
C.材料在弯曲负荷作用下破裂或达到规定弯矩时能承受的最大应力
D.材料在拉断前承受最大应力值