X线管容量是指X线管在安全使用条件下能承受的最大负荷量，是一次负荷的安全性，即在确定曝光时间下所能允许使用的最大曝光条件;X线管容量与管电压的有效值、管电流的有效值成正比。供给X线管的能量，有多少转换成X线
A、小于1％A
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Towriteuphisnovel,Johnislookingforanenvironmentfree________outsidedistraction.
Researchfindingshaveshownthatlanguageprocessingcentersaresituatedinasingleareaofthelefthemisphere.
______ofmeaningisaprocessbywhichawordthatoriginallyhadaspecializedmeaninghasnowbecomegeneralized.
Thereisadeadlock(僵局)inthediscussionwhenneithersidegives________totheother.
In1950,()wasawardedtheNobelPrizefortheanti-racistIntruderintheDust.
