不全位错
参考答案：
柏氏矢量不等于点阵矢量整数倍的位错称为不全位错。
Many famous movie stars attended the news briefing (新闻发布会), Jackie Chan and Jet Li. [ ]
A. include
B. including
C. included
D. includes
心绞痛发作时不会出现的心电图变化为
A．ST段降低≥0.55mV
B．ST段抬高
C．病理性Q波
D．T波平坦，双相或倒置
E．心电图变化不明显
