甲状旁腺功能减退影像学表现可包括（）
A.假性骨折
B.基底节钙化
C.可有外生骨疣
D.全身骨硬化
E.皮下组织和韧带可出现钙化
参考答案：B, C, E
—Why are you still watching TV? Please go and do your homework.
—I ________ it. Can I watch it for another ten minutes?
A．finish
B．finished
C．have finished
D．am finishing
二级线路明线架空明线一个增音段内串音防卫度应≥（）dB。
A.50.4
B.45.2
C.42.6
D.41.2
