高压输液泵是高效液相色谱仪的关键部件之一,其工作原理分为恒流泵和恒压泵。
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财政政策的时滞有哪些( )。
A. 识别时滞
B. 生产时滞
C. 决策时滞
D. 实施时滞
货币政策的局限性包括( )。
A. 效果具有短期性
B. 货币流通速度的变动
C. 挤出效应
D. 货币政策的时滞
There was only one female prose writer in the 19th-century America. This was ____________.
A. Harriet Beecher Stowe
B. Hester Prynne
C. Emily Dickinson
D. Anne Bradstreet
Mrs. Stowe's masterpiece is _____________.
A. Life on the Mississippi
B. The Adventures of Huckleberry Finn
C. The Adventures of Tom Sawyer
D. Uncle Tom's Cabin
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