下列哪种现象不总是伴随燃烧发生（）A、火焰B、爆炸C、发光D、发_爱下问搜题

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问题单项选择题

下列哪种现象不总是伴随燃烧发生（）

A、火焰

B、爆炸

C、发光

D、发烟

答案

参考答案：B

选择题

When I was only a child, my mother said that the earth ________ bigger than the moon.

A. was
B. were
C. had been
D. is

判断题

供应链中设施数量增加时，库存和由此引起的库存成本就会减少。