下列器件哪个不能将光信号转化为电信号()
A.CCD相机
B.非晶硅
C.非晶硒
D.光电二极管
E.闪烁体
参考答案:E
解析:闪烁体只能将高能X射线转化为可见光信号。
North Korea fired a long-range rocket last month, but the launch was reported ______ in failure.
A.to end
B.to have ended
C.having ended
D.ending
T2加权像是指()
A.短TR短TE
B.长TR短TE
C.长TR长TE
D.长TR
E.短TR