螺旋扫描中，会造成漏扫的螺距值是
A. pitch=1
B. pitch=0.5
C. pitch=1.5
D. pitch=0.8
E. pitch=0.7
The chair looks rather hard, but in fact it is very comfortable to _______.
A. sit
B. sit on
C. be sit
D. be sat on
I’m hungry. Get me something _________.
A. eat
B. to eat
C. eating
D. for eating
关于准直器的作用,错误的叙述是( )
A. 大幅度少散射线的干扰
B. 决定扫描层的厚度
C. 少患者的辐射剂量
D. 提高图像质量
E. 决定像素的长和宽
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