机械化战争的指挥体制主要以作战部队（）纵向传递信息的树状指挥体制为主。
A.立体化
B.多层次
C.多方位
D.全面
参考答案：B
有99个零件，经检验全部合格，这批零件的合格率为99%．______．
Which sentence is wrong?[ ]
A.I felt it impossible for him to take the exam.
B.I found it impossible that he might take the exam.
C.I thought that he might not take the exam.
D. In my opinion he might take the exam.
