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举一反三
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
any way, the face-recognition technology is good enough to frighten the terrorists
B.
the industry will have to recognize the real situation and work hard to improve the technology
C.
all the claims are premature
D.
we must not expect too much
【单选题】有关18F-FDGPET/CT显像的叙述，正确的是（）。
A.
在CT和PET采集的全过程均采用深呼吸
B.
上检查床前饮水意在快速清除泌尿系统放射性
C.
双时相显像的目的在于鉴别病变的良恶性和（或）鉴别生理性摄取
D.
判断肾上腺病灶代谢活性高低时，可以纵隔血池为对照
E.
延迟显像时，采集时间较常规显像时间要缩短
【单选题】肺癌F-FDG PET显像，显像前准备是
A.
服用脂肪餐
B.
无需特殊准备
C.
禁食至少6小时
D.
检查前一周患者始停服铁制剂，检查前行肠道准备
E.
检测血清HAMA