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【单选题】
用H2C2O4 2H2O标定KMnO4溶液时，溶液的温度一般不超过（ ），以防H2C2O4的分解。A.
60 °C
B.
75 °C
C.
40 °C
D.
85 °C
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【单选题】“将商业或行政事务处理按照一个公认的标准，形成结构化的事务处理或报文数据格式，从计算机到计算机的电子传输方法”，这是联合国标准化组织对()的一种权威的规范化定义。
A.
Message
B.
Internet
C.
VAN
D.
EDI
【单选题】()是指将商业或行政事务处理，按照一个公认的标准，形成结构化的事务处理或信息数据格式，从计算机到计算机的数据传输方式。
A.
RFID
B.
EDI
C.
GPS
D.
EOS
【单选题】Both Sally and Sam receive a 10% raise in a single year. Sally increases her demand for ground beef whereas Sam decreases his demand for ground beef.
A.
This is impossible.
B.
This is only possible if Sally considers ground beef an inferior good, and Sam views it as a normal good.
C.
This is only possible if Sally has lower income than Sam.
D.
This is only possible if Sally considers ground beef a normal good and Sam views it as an inferior good.
【单选题】The 'gulf'(Line2, Para. 2)refers to
A.
the friction between web companies and regulators.
B.
the differences between European and American privacy practice.
C.
the argument between data watchdogs and governments.
D.
the conflict between customers and companies which disclose data.
【单选题】The word 'prevalent'(Sentence 1, Para. 1)in this passage means______.
A.
current
B.
famous
C.
notorious
D.
acceptable
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