空中交通管制员应当根据仪表飞行规则的条件，配备（）间隔。
A.垂直
B.纵向
C.侧向
D.A、B和C
参考答案：D
He was disappointed to find his suggestion_______.
A．turning down
B．turned down
C．to be turned down
D．to turn down
本病例的代表方为
A．补天大造丸
B．归脾汤
C．月华丸
D．参苓白术散
E．四神丸
