测定空气中甲醛时，采样系统由（）、（）和空气采样器串联组成。采样时用皂膜流量计对空气采样器进行流量校准。
参考答案：引气管；吸收管
—I want to know if your sister will go to the movie.
—If your sister , so .[ ]
A. does; does she
B. will; will she
C. does; will she
D. will; does she
邓 * * 社会主义本质论中的价值目标是指发展生产力。( )
