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问题 单项选择题

《铁路旅客运输办理细则》规定，I级放射性同位素不得与感光材料及活动物配装，与食品配装需要隔开（）以上距离。

A.0.5m

B.1m

C.1.5m

D.2m

答案

参考答案：D

选择题

When the police broke into the room, they were terrified at the scene: a middle-aged man lying on the         floor, with a cupboard _______him, his feet and hands ______ tight with electric wires, his throat _____ open and a pair of scissors ______ deep in the chest.      [ ]

A. covered; tied; cut; cut                      

B. covering; tying; cutting; cutting  

C. covering; tied; cut; cutting                  

D. covered; were tied; cut; cutting
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单项选择题

钼缺乏患者生化检查可见（）。

A.血蛋氨酸浓度升高

B.尿酸浓度升高

C.尿硫酸盐排出量减少

D.A+B+C

E.A+C
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