同塔内各配水槽水位差不大于()
A.1~5%
B.5~10%
C.10~15%
D.15~20%
参考答案:C
常用的皮带宽度有500mm.650mm。800m.1000mmm.().1400mm等.
A.900mm
B.2000mm
C.1800mmm
D.1200mm
鼻咽部横断面CT扫描的体位与基线是
A.俯卧位,听眉线
B.仰卧位,听眦线
C.仰卧位,听鼻线
D.仰卧位,听眉线
E.俯卧位,听鼻线