判断题 在满足相干条件的光波的相遇区域内，任何一个位置的合成光的强度都不会小于其中一列光的光强。

单项选择题 Who is usually regarded as the first American female poet?

单项选择题 Which of the following means that we have not corrected for depreciation -- the reduction in the value of economic capital as it slowly wears out and approaches the end of its useful life?