A . W/L＞M+2s，L正常，W＞M+2s
B . W/L＜M-2s，L＜M-2s，W＜M-2s
C . W/L正常，L正常，W＞M＋2s
D . W/L正常，L＞M+2s，W＞M+2s
E . W/L正常，L＜M-2s，W正常