根据不同成像技术综合应用原则,下列选项不正确的是()
A.骨折-X线摄影
B.脑出血-MRI
C.冠状动脉显示-DSA
D.胆囊结石-B超
E.脑外伤-CT
参考答案:B
The faces of four famous American president on Mount Rushmore can be seen from a _____ of 60 miles.[ ]
A. length
B. distance
C. way
D. space
在CuSO4中,铜元素、硫元素、氧元素的质量比是[ ]
A.1:1:4
B.2:1:2
C.8:4:8
D.64:32:64