30℃、100kPa下，在填料塔中用水吸收混合于空气中的SO₂。在塔内某一点上，气相中SO₂的浓度为y=0.09，液相中SO₂的浓度为x=0.002，气相传质阻力认为集中在2mm厚的气膜中。计算稳定条件下在该点上SO₂的传质速率。已知SO₂在空气中的分子扩散系数为5×10^-5m²/s，30℃时SO₂水溶液的平衡关系为y=26.5x。

A. insist its plan to build trash stations in each district
B. establish new high-tech, low-smell facilities
C. build stations only in low-income communities
D. reach an agreement with the Upper East Side of Manhattan

A. 恩格尔系数
B. 生产者物价指数
C. 国内生产总值物价平减指数
D. 消费者物价指数

A. Family groups.
B. Larger groups.
Classmates groups.
D. Friendship groups.

A. Watching it without the subtitles.
B. Listening without watching it.
C. Being familiar with the scenes.
D. Reading after the characters.