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举一反三
【单选题】下列毒素毒性最强的是:
A.
白喉毒素
B.
肉毒毒素
C.
破伤风痉挛毒素
D.
链球菌溶血毒素
【单选题】Which of the following is not a data protecting method?
A.
Locking up terminals.
B.
Replacing data in other storage facilities.
C.
Supplying a password before data access.
D.
Ranking data frequently in computer files.
【单选题】下列毒素中毒性最强的是()
A.
肉毒毒素
B.
副溶血性弧菌产生的溶血素
C.
沙门菌产生的内毒素
D.
金黄色葡萄球菌产生的肠毒素
E.
蜡样芽孢杆菌产生的肠毒素
【单选题】下列毒素中毒性最强的是(    )
A.
肉毒毒素    
B.
副溶血性弧菌产生的溶血素
C.
沙门菌产生的内毒素    
D.
金黄色葡萄球菌产生的肠毒素
E.
蜡样芽胞杆菌产生的肠毒素
【多选题】Which of the following statements about quantitative data and qualitative data is/are true?
A.
Usually, quantitative data are produced by unstructured and semi-structured methods.
B.
Usually, qualitative data are produced by structured methods.
C.
Quantitative data are numerical or can be made numerical.
D.
Qualitative data are in the form of words, texts, or images.
E.
Qualitative data are not quantifiable.
【单选题】下列毒素毒性最强的是:
A.
破伤风毒素
B.
肉毒毒素
C.
肠毒素
D.
红疹毒素
E.
内毒素
【单选题】下列毒素中毒性最强的毒素是
A.
破伤风痉挛毒素
B.
白喉外毒素
C.
肠毒素
D.
毒性休克综合征毒素
E.
肉毒素
【简答题】Which of the following statements about primary data and secondary data is/are true?A. Primary data are collected by the researcher; secondary data are derived from primary data. B. Secondary data are...
【单选题】Which of the following is a distinguishing factor between data archiving and data backups?()
A.
Data archives are kept for disaster recovery purposes while data backups are kept for indefiniteperiods of time so that there is an information record.
B.
Data archives are kept for documentation purposes to easily recover data while data backupsare kept for immediate server recovery.
C.
Data archives are kept off-site for data warehousing purposes while data backups are keptlocally for immediate server recovery purposes.
D.
Data archives are kept for indefinite periods of time so there is a record while data backups arekept for disaster recovery purposes.
【单选题】Which one of the following is not a positive effect of 'better data'?
A.
better data is something that is desired.
B.
better data is good for corporate earnings.
C.
better data will lead to the fed starting to pull back from its quantitative easing.
D.
better data is good for stock prices.
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