画轴测剖视图，不论物体是否对称，均假想用两个相互垂直的（）将物体剖开，然后画出其轴测

对上海别克轿车，出现故障代码P0751（1-2/3-4挡换挡电磁阀性能，无1或4挡）和P0753（1-2/3-4挡换挡电磁阀电气电路）时，ECU采用的应急保护措施是（）一样的。

A．不完全

B．完全

C．基本

慢性血吸虫肝病最特征性的CT表现是（）

A.肝脏广泛的线样钙化

B.合并肝占位

C.肝内汇管区低密度灶及中心血管影

D.门静脉系统钙化

E.肝硬化和门脉高压

• A. How about her
• B. What happened
• C. I believe he
• D. poor Alan
• E. I can imagine
• F. I guess something
• G. ls she fine now
• H. I don’t know
  Robyn: Has Alan shown up yet
  Scottie: Nope. (56) might have come up.
  Robyn: I wonder what happened.
  Scottie: (57) . I hope it’s nothing serious.
  Robyn: Last week his sister was admitted to the hospital.
  Scottie: Oh (58)
  Robyn: His sister had a car accident last week.
  Scottie: (59)
  Robyn: She’s still in a coma(昏迷).
  Scottie: Oh, (60) . His sister is the only he has left since his mother died last year.

为人做事中要学习的主要问题不包括（）。

A、心态的问题

B、人际交往的问题

C、如何把握形式的问题

D、自我管理的能力

阿魏酸是下列哪类化合物（）

A.香豆素

B.木脂素

C.苯丙酸

D.蒽醌类

E.黄酮类