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题目内容
（河北农业大学大学英语Ⅳ）
Formerly found only in large industrial applications, microwave ovens now have become a standard ________ of most modern kitchens.
A、
fixture
B、
fixtures
C、
structure
D、
structures
A、
fixture
B、
fixtures
C、
structure
D、
structures
参考答案
