题目
A.must have
B.couldn't have
C.ought to have
D.shouldn't have
第1题
A.retailers&wholesalers
B.manufacturers
C.serviceproviders
D.suppliers
第3题
A.employers
B.employees
C.employs
D.employment
第4题
第5题
A. Verifying the OS manufacturers
B. Locating a hosting facility
C. Consulting with the system manufacturers
D. Interviewing system owners
第6题
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