   7 
  
2017/10/12
                                         7                                                  =       30 ~ 40                   2          =       80 ~ 90     2          =       100 ~ 150                                                          2000 ~ 2500                                                         20                   15                        0.8 =         40      2   40  ~50    1   50     0.5              3                                                                                                                                    =   ÷                                                        20~30                                                                                                                            = ︹      -  ︺  0.2    -4      -4 ~ -1       -1          45   70       45 -70   0.2 = -5                                                  D                                                                                                   = 205 -    = 220 -         70%        55%~ 69%        40%~54%                 = 170-     70         170 -70=100  /             170 -    0.9                         a=       0.74    b =       0. 082+34.89     =  a-b  ÷    100%          b =       0.082+44.74             17%~23%   20%~27%     25%   30 %                                                              14%~20%   17%~24%                        5%    15%                                                      =  ÷             1.              2.              3.                                                                                                                                                 
 
    
 
 
  
 
2014-2015 ©                      蒙ICP备05070829号