过热器、再热器一般用（）测量蠕变。
参考答案：游标卡尺或自制的样板
-- Mum, Mary bought a pet dog yesterday. Could you please buy __________ for me?
-- Sure. But you must look after it yourself.
A．that
B．this
C．it
D．one
股静脉血栓形成时，下述哪项结局不易发生
A．阻塞血流
B．机化
C．钙化
D．血流完全恢复正常
E．脱落
