可燃性气体、蒸气或粉尘爆炸极限的概念可以用（ ）来解释。 A．爆炸理论 B．热爆炸理论 C．爆炸极限理论 D．热爆炸极限理论

（）was made poet laureate in 1813. But most of his works, according to modern critics , are ' the product of literary industry, not of literary creation.

A．William Wordsworth
B．Samuel Taylor Coleridge
C．Robert Southey
D．George Gordon Byron

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The main idea running through the dramatic poem Prometheus Unbound is that of（）. 点击查看答案