I really don't know .：I really don't know ------the problem.A what to solve (这个我知道肯定错的)B how to solveC why to solve (这个也是错的吧 ,)D who to solve 主要是 B D 有点纠结 ,我们老师说 选D 但我觉得B好像不错

x���JQ�_e�J��>!��P\�\QK�[5D����OZY��fJ�m��9g�^� �[Q��u.g��o�7G�x�!*�ey�Jx)a%
��Su^�e�xH�HT �Ҧ� ��?qb��-�2W�~ò��Y�JyJ�ݪuT1��/��ɇv Kw~T��+ko�� N�uʧ��o%Q^�
�����|<7�"8і�\MR=˵
Xj��9�q���Q�K��4] �>:���{��vfa��W �YvhQ$��;�wp�F른���KV\>�.���d4f�<{��Bg���1� vb�>�U�jC���(A/�ױ.ʘ4O��G�AtG<����3
�Er�m'�} f�,?�t���m��i ���5�&j �
t;�.��M�#��ߖ�J]��0Q��7��2!A,�l�A��6� �c�3=�+d)