下列哪项不属冷哮的主证（）
A.喉中哮鸣声
B.呼吸急促
C.痰白而粘
D.口渴喜饮
E.胸闷如窒
参考答案：D
解析：口渴喜饮是热哮的表现。
The （71） has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.
A．application
B．information system
C．operating system
D．information processing
主要为党政高级领导机关服务的公文传递是( )。
A．普通邮寄 B．机要通信 C．机要交通 D．公文交换
