溃疡性结肠炎的病变分布特征是（）
A.连续性
B.跳跃性
C.节段性
D.局限性
E.全层性
参考答案：A
—How did you sleep last night?
— Oh, I slept like a log last night. What does the underlined part mean?
A．slept little
B．slept very deeply
C．slept shallowly
D．slept still
曝光时间大于0.5s，测量管电流的最佳仪表是
A．V表B．A表C．kV表D．mV表E．mA表
