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对于空心毛细管柱，因无填充物，不存在涡流扩散，故A=0
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当u为最佳时，要使H足够小，只有A、C较小时，柱效才会高
组分在气相中的扩散系数Dg与组分的性质、载气的性质、温度、压力等有关
涡流扩散相A与λ、dp有关，一般较小颗粒填料比较大颗粒易得到均匀填
U5 Additional Language QuizThere are ten sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentences.1. He writes on both sides of the sheet to ________ paper.A. converse B. convert C. conserve D. consent2. The computer laboratory is an essential ______ for students.A. source B. force C. resource D. reinforce3. After a ______ debate, members of the committee finally voted to approve the funding.A. contentious B. abstentious C. contented D. contended4. The rate of population growth reached a peak in 1999 and declined in ______ years.A. consequent B. frequent C. infrequent D. subsequent5. I’m feeling a little depressed at the moment, but I’m sure good times are ______.A. in the corner B. at the corner C. around the corner D. on the corner6. Thousands of soldiers are working to ______ food and blankets to the refugees.A. contribute B. distribute C. attribute D. distract7. As we were __________ giving up hope, a letter arrived.A. on the point of B. for the point of C. to the point of D. in the point of8. Already there are many ______ fuel vehicles on the market, powered by anything from solar power to natural gas.A. alterable B. alternate C. alterative D. alternative9. Britain is ______ its effort to secure the release of the hostages.A. densifying B. intensifying C. identifying D. classifying10. The problems _______ the new government are enormous.A. conforming B. conferring C. affrontingD. confronting
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