物体原子序数越大,X射线的穿透本领越 。(请填写大或者小)The larger the atomic number of the object, the the X-ray penetration power.(Please fill in larger or smaller)


物体原子序数越大,X射线的穿透本领越 。(请填写大或者小)The larger the atomic number of the object, the the X-ray penetration power.(Please fill in larger or smaller)

正确答案:小