不属于X线辐射损伤的因素是
A.辐射线性质B.X线剂量C.照射方式D.屏-片系统E.照射部位和范围
参考答案:D
解析:屏-片系统属于照片产生模糊的因素。
属于细胞毒素的是
A.白喉毒素 B.志贺毒素 C.破伤风痉挛毒素 D.金黄色葡萄球菌肠毒素 E.霍乱肠毒素
________advertisements, TV programs are often made boring.[ ]
A. Regularly interrupted by
B. Regularly interrupting
C. To regularly interrupt
D. To be regularly interrupted by