脱氢提馏塔塔底液位高时可将出料量适当加大同时适当减小进料量。
参考答案:对
男性,60岁,溃疡穿孔单纯修补术后7天,体温38℃,右上腹痛,肝区叩痛,右肺下野呼吸音弱,X线右膈升高,可能并发()
A.急性胆囊炎
B.右下肺炎
C.再穿孔
D.右膈下脓肿
E.急性胰腺炎
Melissa and LoveLetter made use of the trust that exists between friends orcolleagues.Imagine receiving an (71) from a friend who asks you to open it.This is whathappens with Melissa and several other similar email (72) .Upon running,such wormsusually proceed to send themselves out to email addresses from the victim’s address book,previous emails,web pages (73) .
A.attachment B.packet C.datagram D.message
As administrators seek to block dangerous email attachments through the recognition ofwell—known (74) ,virus writers use other extensions to circumvent such protection.Executable(.exe)files are renamed to.bat and.cmd plus a whole list of other extensions and wilt still runand successfully infect target users.Frequently,hackers try to penetrate networks by sending an attachment thatlooks like a flash movie,which,while displaying some cute animation,simultaneouslyruns commands in the background to steal your passwords and give the (75) access to yournetwork.供选择答案: