How did the researchers carry out their study？A．They studied the findings of several previ

How did the researchers carry out their study？

A．They studied the findings of several previous research projects.

B．They conduced a questionnaire with 411 pilots.

C．They collected data from the database at the Johns Hopkins University

D．They analyzed the circumstances of the crashes involved.

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

According to the research by Dove,how long did men spend on DIY each week？A．4.7 hours.B．6.

答案解析
They were determined to carry out the research at once.A.fetchedB.conductedC.attractedD.pu

答案解析
The research carried out in eight countries______.A．reveals the relationship between sleep

答案解析
According to the research carried out by York University researchers, for obese people,A．t

答案解析
How did the woman learn about the process she described？A．She was doing research for a pap

答案解析
A good deal of research is being carried out nowadays______ the cause of juvenile crime. I

答案解析
How many unique area addresses can the ISIS TLV 1 carry?()

答案解析