It might take 30 to 40 years for computer newspapers to replace traditional newspapers,because___.
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The noise killing system is not yet popular mainly because___.
What can you do if the international line is engaged?
[A] expensive
[B] mechanical
[C] flourishing
[D] complicated
土条搓成3mm时仍未产生裂缝及断裂,表示土样的含水量高于塑限。()
A. 正确
B. 错误