对火灾形成特征不可预料的场所,可采用( )。
A.感烟和感温探测器组合
B.感烟探测器
C.感温探测器
D.根据模拟实验的结果选择探测器
参考答案:D
John's success has nothing to do with good luck. It is years of hard work ________ has made him
what he is today. [ ]
A. why
B. when
C. which
D. that
目前治疗慢性疼痛最好的方法是()。
A.神经阻滞治疗
B.吗啡等药物治疗
C.运动手法治疗
D.永久损毁疼痛传导通路
E.综合治疗