病因于热，素体阳盛，痰从热化，属痰热为患，则发为

A．痰少质粘或如絮条
B．痰多黏腻色白
C．痰稀薄而白
D．痰黏稠而黄
E．痰少而黏或带血丝

Be careful when you open an unknown document. It might contain the deadly virus which

could entirely ______ your computer system in a minute.    [ ]

A. break down    

B. crash    

C. block out  

D. dissolve