题目内容

【C11】______

A. fluently
B. efficiently
C. exactly
D. actually

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可用于制作盛放食物用具的塑料有 ()

A. 聚乙烯塑料(PE)
B. 密胺塑料(MF)
C. 聚丙烯塑料(PP)
D. 硝酸纤维素塑料(赛璐珞，CN)

A． ofB． offC． outD． for

A. of
B. off
C. out
D. for

【C19】______

A. average
B. normal
C. ordinary
D. equal

A． stopB． coverC． shootD． interrupt

A. stop
B. cover
C. shoot
D. interrupt