鼓励病人的亲朋好友探访，对处于哪个阶段的临终病人更重要( )
A．否认阶段B．愤怒阶段C．协议阶段D．抑郁阶段E．接受阶段
参考答案：D
Last Sunday my aunt _____ at home with me. We were watching TV all day.[ ]
A. was
B. were
C. is
D. are
美国在科索沃战场上投下了至少10吨贫铀弹，贫铀弹的主要成分是低放射性的238U，它与制造原子弹的235U属于
A．同位素
B．同一物质
C．同分异构体
D．同素异形体
