腰椎椎管前后径CT测量值的正常范围是（）A、25mm－30mm。B、15mm－25m
题型：单项选择题
问题：
腰椎椎管前后径CT测量值的正常范围是（）
A、25mm－30mm。
B、15mm－25mm。
C、12mm－15mm。
D、10mm－12mm。
E、8mm－10mm。
题型：单项选择题
TOTAL EXPENSES FOR THE HVE DIVISIONSOF COMPANY H
The figure above represents a circle graph of Company H’s total expenses broken down by the expenses for each of its five divisions. If O is the center of the circle and if Company H’s total expenses are $5,400,000, what are the expenses for division R ？（）
(1)x=94
(2)The total expenses for divisions S and T are twice as much as the expenses for division R.
A．条件(1)充分，但条件(2)不充分．
B．条件(2)充分，但条件(1)不充分．
C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D．条件(1)充分，条件(2)也充分．
E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
