Compared with a non-smoker, a smoker is more likely to be at risk of contracting various cancer.
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测定沥青环球软化点,要求起始温度为5℃±0.5℃,杯中水温在5min内调节至升温速度维持在5℃±0.5℃/min。()
A. 正确
B. 错误
细集料的表观密度试验,以两次平行试验结果的算术平均值作为测定值,如两次结果之差值大于0.01g/cma,应重新取样进行试验。()
A. 正确
B. 错误
相对密度是砂紧密程度的指标。()
A. 正确
B. 错误
What might be the most suitable title for the passage?
A Dentist's Work
B. Psychological Problems
C. Fears in Childbirth
D. Psychological Factors in Pain Endurance