The example of a lahar from the Nevada del Ruiz volcano in 1985 is used to show that
A．acoustic flow monitors are effective in predicting lahars.
B．acoustic flow monitors are used all around the world.
C．acoustic flow monitors can completely prevent lahars.
D．acoustic flow monitors are sensitive to higher frequencies.

单项选择题脂肪氮芥的作用机理是( )

未分类题What is the writers attitude toward the prospect of volcanic eruption prediction?

未分类题商业银行中间业务的审计目标包括()。

未分类题The word 'reciprocal'(Line 2, Paragraph 3)is closest in meaning to

未分类题According to Paragraphs 4 and 5, which of the following statements is true about the study?A．The study was a long-term observation on 4,373 subjects.B．The layoff offers people more time participating in such social activities as community groups.C．A laid-off worker may also lose his membership in a professional organization.D．Young people are more likely to lose their jobs than people in their senior years.

未分类题We can infer from the passage thatA．no definite conclusion has been reached yet.B．the author is very certain about the location of the site.C．Paititi is the first site they have found in Peru.D．Paititi was built by the Inca.

判断题对于新建公路，用路基临界高度来确定路基干湿类型。()

未分类题拟发行上市公司的改制重组应遵循以下()原则。

未分类题According to the text, which of the following is true?A．The newly discovered site is the ancient 'lost city' of Paititi.B．Paititi has been attracting many explorers since it is an excellent tourist resort.C．The newfound site will be proposed as a place of interest.D．The location of the site is exactly in accord with the historical records.

未分类题According to Francisco, the Peruvian government officials willA．have a press conference.B．go to the newly built site.C．find where the ancient city is.D．send a group of people to probe the ruins.

判断题路基碾压中发生弹簧现象时，一般都用加大压实功的办法来解决。()

判断题加大压实功是提高路基的压实度最有有效的措施。()

未分类题The best title for the text may beA．We Can Live Longer in the 21st Century.B．Cancer Can Be Conquered Soon.C．The Final Frontier of the 21st Century.D．Scientific Breakthroughs of the 21st Century.

未分类题实质性测试有()基本类型。

判断题在排水较困难的挖方和填方路段，只须采用相应的隔离层措施即可解决问题。()