单项选择题

A laser can be best described by______.

A．a device for stimulating atoms and molecules to emit light
B．an atom in a high energy state
C．a technique for destroying atom or molecules
D．an instrument for measuring light waves

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热门试题

单项选择题The author suggests that______.

A．poetry tends to make the reader disappointed
B．poetry makes its readers sentimental
C．poetry is more important than words
D．poetry often captures real human feelings

单项选择题Poetry tries, persistently, to express______.

A．what love and death mean
B．what people think about themselves
C．what people feel but find it hard to describe
D．how people go through life