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举一反三
【单选题】CT探测器的作用是
A.
探测患者位置是否准确
B.
接收X线并将其转换为电信号
C.
探测扫描时有无散射线
D.
将模拟信号转变为数字信号
E.
接收X线并检测有无散射线
【单选题】Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago. They made these tools by hitting one stone agai...
A.
disastrous.
B.
unpredictable.
C.
exciting.
D.
colourful.
【多选题】下面对晶体智力的描述正确的是( )
A.
它不依赖于文化和知识，而取决于个人的禀赋
B.
它在发展到人的中年之后有下降的趋势
C.
在人的一生中是稳步上升的
D.
它取决于后天的学习