By means of various types of wind tunnels, （ ）simulate most of the flight conditions to which an airplane is subjected.
A.which aeronautical engineers can B.aeronautical engineers can C.the ability of aeronautical engineers to D.aeronautical engineers, being able to
相关问题推荐
-
s="" fair="" to="" keep="" a="" bird="" （="" ）in="" cage="" all="" the="" time?'>
Do you think it's fair to keep a bird （ ）in a cage all the time?
A.restricted B.limited C.confined D.enclosed -
The population of Seattle is a conglomerate of people from different ethnic and cultural backgrounds.
A.a company B.a fluctuation C.an assortment D.a matching -
No matter what high positions one may hold, he or she should guard against （ ）.
A.arrogance B.artifact C.archives D.ascertains -
Unlike other creatures, who are shaped largely by their （ ）environment, human beings are products of a culture accumulated over centuries, yet one that is constantly being （ ）by massive infusions of new information from everywhere.
A.harsh ... unconfirmed B.surrounding ... upheld C.immediate ... transformed D.natural... mechanized -
Scientists should have choice as to what areas they explore, and certainly have the ethical right and obligations as （ ）to influence what use is made of their discoveries.
A.anthropologists B.philanthropists C.archaeologists D.humanists