密度测井仪设计的短源距的目的是克服（）对测量的影响。
A、泥饼
B、泥浆
C、井径
参考答案：A
Harry _________ the story at the point where John had left off. [ ]
A. took in
B. took down
C. took up
D. took over
输卵管结扎术术前（）小时给予镇静剂。
A.0.5-1
B.0.5-2
C.1-1.5
D.1-2.5
