标准正态分布曲线的特征是()
A.μ=σ,σ=0
B.μ=0,σ=1
C.μ=0,σ=-1
D.μ=1,σ=0
E.μ=1,σ=1
参考答案:B
The ARPA may swap targets when automatically tracking if two targets()
A.are tracked on reciprocal bearings
B.are tracked at the same range
C.are tracked on the same bearing
D.pass closely to each other
MRCP显示的"双管征"最常发生于()
A.胰头癌
B.胰体癌
C.胰尾癌
D.弥漫性胰腺癌
E.胰腺炎