Wherever such an area is located, it will be immediately ______ by the enemy if armed forces are lacking.

A．taken

B．caught

C．occupied

D．kept

如果在线色谱分析仪10通阀需要维修必须（）进行维修.

A.技术人员

B.送单位维修部门

C.送生产厂家

D.操作人员