The police fortunately gained the key clew according to the foot mark in the ______ of the
A. clay
B. dirt
C. mud
D. soil
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作业人员班前应充分休息,保持精神饱满,严禁班前()小时内饮酒。
A. 5
B. 6
C. 7
D. 8
分组人工捣固时,前后距离应不小于()轨枕,作业人员前脚不得伸出轨枕边缘。
A. 1根
B. 2根
C. 3根
D. 4根
Biologically, there is one quality that distinguishes us from animals; the ability to laugh. And laughter, in turn, depends on the most complex and subtle one of all human qualities: the sense of humor. The sense of humor plays a key role in nearly every aspect of human life. Write a composition of about 200 words on the following topic: Why Is the Sense of Humor Important?