北宋初年出现了“将不识兵,兵不识将”的局面,军队战斗力大为削弱。造成这一局面的直接原因在于统治者实行( )
A:养兵政策
B:守内虚外政策
C:更戍法
D:一职多官
A. Have you got an email from Tom?
B. What did your mother have for lunch?
C. Does Lingling like hamburgers?
D. He says sandwiches are delicious.
E. I had eggs and milk.
对下列四幅图的理解不正确的是( )