People in that district______use oil lamps, for there is no gas or electricity.

"Smart clothes"of the future will turn energy from the sun into electricity.A. 未

Re--|||-frigerators are costly and they need electricity. Yet spoiled food not o

[单选题]When we run a plastic comb through our( )the comb and the hair may have sta

[单选题]In cleaning up an oil spill, the use of chemical agents would______.A．absorb the oil for easy removalB．remove the oil from the waterC．disperse or dissolve the oil in the waterD．not affect the oil

[单选题]Crude oil carriers often use （）A . Big shipsB . Huge shipsC . Large container shipsD . Supertankers

In the 19th century，water power was widely utilized ____ （generate） electricit

[单选题]Injectors for use with heavy fuel oil must be cooled by either water or light oil to_____.A．prevent heat corrosion to internal componentsB．increase fuel delivery rate and economyC．prevent pre-ignitionD．avoid carbonization of the nozzle tips

[单选题]Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.A . scavengingB . startingC . coolingD . blowing

(n.)service provided for the public, for example an electricity, water or gas su

[单选题]Somepeoplebelievethatsinceoilisscarce,the____ofthemotorindustryisuncertain.A．)terminalB)benefitC)fateD)estimate