同一台异步电动机，用三角形接法起动和用星型接法起动相比，前者的起动电流(线电流)是后者的3倍;前者的起动转矩是后者的3倍。()

判断题一台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.

未分类题The word 'conversation'(Line 8, Paragraph 4)probably implies thatA．advertisers need to talk to teenagers.B．all brands can improve through chatting with consumers.C．consumers have their rights to avoid advertisements' interference.D．a survey should be carried out before products are launched.

未分类题According to the passage, we can infer thatA．teenagers sometimes are promotion targets.B．many people don't want to be bothered by ads.C．teens can get a free sample by sending a text message.D．text message advertisement serves as a lure for teenagers.

未分类题Dwight Evans indicates thatA．environmentalists shouldn't take the corporations as their enemies.B．corporations should be given enough time to improve themselves.C．it is unavoidable for corporations to pollute the environment.D．the economic benefits are more important than anything else for a company.

未分类题By saying 'environmentalists shouldnt jump down their throats', the author means that environmentalistsA．shouldn't be disappointed with the industries.B．shouldn't be indifferent to the situation.C．shouldn't get angry and criticize the industries.D．shouldn't laugh at the industries.

未分类题我国就业服务体系包括（ ）。

未分类题Which of the following serves as the best title for this text?A．Causes of UnemploymentB．A Study on UnemploymentC．A Study on Social InvolvementD．Impact of Unemployment on Social Participation

未分类题The main purpose of the author in writing this text is toA．introduce dinosaurs and their homeland in Dorset and East Devon.B．describe the natural history, geology and the beauty of the Jurassic Coast.C．suggest that people take an adventure to Jurassic Coast alone.D．advertise the charm of Jurassic Coast and attract more tourists to go there.

未分类题劳动力辞职的原因有（ ）。

未分类题According to Lennon, we can inferA．landslips are helpful to visitors while visiting Jurassic Coast.B．the best time to visit Jurassic Coast is tide season.C．bad weather can make dinosaur fossils loose, thus more difficult obtained by tourists.D．finding dinosaur fossils can help tourists know more about the formation of the coast.