___________ is used to control rolling of the aircraft.

The hydraulic _____ is used to control engine speed.

The passion of love is cited by the author to show how ______.A．unable we are to control o

______ is used to prevent the entry of sea water to the machinery space.A.A special sealin

The main function of the hormone is to control the bodys biological clock, ______ we know

The example of carbon pollution is used to illustrate______.A．transformation of language i

______ is often used to refer to the US Department of Defense.A．The Capitol HillB．The Whit