In the sentence “Frederick Wallace Smith was born into a wealthy family clan on August 11, 1944 in Mississippi” , the s ignal words of time are ____________ .
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【简答题】起重机用钢丝绳拉一物体竖直上升时,钢丝绳突然断后的一瞬间,物体将( ) A. 下降 B. 停止上升 C. 继续上升 D. 无法判断