题目内容

【C2】______

A. made
B. saw
C. looked
D. turned

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【C11】______

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

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