一台380V、50Hz的感应电动机，把它接在380V、60Hz的电源上运行，则电机的主磁通将下降;电机的最大转矩将下降。()

未分类题Why does the system fail to arrest a wanted person?A．The system is not effective in recognizing people.B．The system does not look at skin color or one's gender.C．The system does not consider people's specific features.D．The system is highly inaccurate and can be easily fooled.

判断题在最佳含水量下路基压实后，其水稳定性最佳。()

未分类题What is the ACLUs attitude toward the system?

未分类题The probable title of this passage isA．Multifunction of Mobile Phones.B．A Rising Industry—Text Messages.C．Ads in Text Messages.D．Should We Stop Text Message Ads?

未分类题The author cites the example of the 16-year-old Albanian high-school drop-out to showA．the extreme poverty of his country.B．the terrible picture of illegal migration.C．the strong desire of poor people to leave for rich countries.D．the difficulty in a long cross-border journey.