题目内容

A．nationalB．operationalC．internationalD．vocational

A. national
B. operational
C. international
D. vocational

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A．originatedB．basedC．improvedD．dwelled

A. originated
B. based
C. improved
D. dwelled

A．activeB．vividC．diverseD．mobile

A. active
B. vivid
C. diverse
D. mobile

A．allocateB．substituteC．alternateD．attribute

A. allocate
B. substitute
C. alternate
D. attribute

A．forB．ofC．onD．in

A. for
B. of
C. on
D. in