If all business goes paperless, at least one million tons of paper will be ______  a year.  [ ]

A. used

B. saved

C. copied

D. offered

急性颅内压增高时病人早期生命体征改变为（）

A.血压升高，脉搏变缓，脉压变小

B.血压升高，脉搏增快，脉压增大

C.血压降低，脉搏变缓，脉压变小

D.血压降低，脉搏增快，脉压变小

E.血压升高，脉搏变缓，脉压增大