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【单选题】
A.
Because of the development of industry.
B.
Because of the pasteurization process.
C.
Because of the new discoveries.
D.
Because of the increasing number of cattle.
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参考解析：
刷刷题刷刷变学霸
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【单选题】Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D) on the right side of the paper. You should choose the ONE that best fits into t...
A.
effect
B.
summary
C.
conclusion
D.
concept
【单选题】6（） A.attachment B.packet C.datagram D.message
A.
Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (6) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (7) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (8) .
B.
As administrators seek to block dangerous email attachments through the recognition of well-known (9) , 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 will still run and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (10) access to your network.
【单选题】(115～117题共用题干)患者，男，38岁。出现下肢麻木、发凉，间歇性跛行8年，有20年吸烟史。近来病情发展，持续疼痛，夜间尤甚，右下肢肌肉萎缩，有足背动脉搏动消失，诊断为血栓闭塞性脉管炎。 不考虑该患者为下肢动脉硬化性闭塞的主要依据是
A.
患者年轻，病史长
B.
间歇性跛行
C.
足背动脉搏动消失
D.
夜间疼痛重