Fires resulting from spontaneous combustion are usually caused by the improper disposal of（）.

A . decreased piston to cylinder head clearance B . increased exhaust system back pressure C . early fuel injection timing D . low scavenge air temperature

A . Avoid channels with microwave oven noise. B . Manually remove channels not supported by the VoWLAN clients. C . Avoid 802.11n 40-MHz wide channels. D . Automatically avoid nearby radar.

A . low oil pressure B . high coolant pressure C . leaking fuel injector D . cracked cylinder head or liner

A . less fuel will enter the cylinder B . higher the cylinder combustion temperature C . more complete the fuel combustion D . more rapid the rise in combustion pressure

A . high oil pressure B . excessive bearing end play C . plugged oil control rings D . engine overload

A . look for a CO extinguisher B . use a soda acid extinguisher C . shut off the fuel supply D . smother the fire with rag

A . a worn cylinder B . broken piston rings C . either A or B D . none of the above

A . poor distillate quality B . reduced evaporator capacity C . low brine concentration D . improper vacuum regulatio

A . piston rings B . valve guides C . valve seals D . all of the above

A . SELECT SUBSTR( ‘Hello World’,1) FROM dual; B . SELECT INITCAP(TRIM (‘Hello World’, 1,1)) FROM dual; C . SELECT LOWER(SUBSTR(‘Hello World’, 1, 1) FROM dual; D . SELECT LOWER(SUBSTR(‘Hello World’, 2, 1) FROM dual; E . SELECT LOWER(TRIM (‘H’ FROM ‘Hello World’)) FROM dual

A . A locutionary B . An illocutionary C . A perlocutionary D . A speech

A . an unprotected drop-light bulb B . careless disposal or storage of material C . smoking in bed D . worn electrical wires on power tool

A . too great a loading B . fouled turbocharger C . bad combustion D . excessive air

A . increases the number of VSANS without limit B . reduces power consumption per rack C . cuts the number of network cards and cables D . simplifies the management of SAN domai

A . improper fuel rack positing B . lengthy exhaust valve duration C . extend operation at light load D . excessively early injection timing

A．lower cost B．higher performance C．sustained productivity D．Nil of the above

A．mass-production methods B．popular demand for a better product C．a decrease in price D．competition among manufacturers

A．drinking it excessively over long time B．using it quantitatively for medical care for a long period C．consuming it exclusively on social occasions D．applying it carelessly to unpleasant symptoms

A．humans' desire for food and clothing B．humans' longing for friendship C．inevitable evolution trend D．development of civilization 此题为多项选择题。

A.The quantity of products will be considerably increased. B.The cost of computers will be decreased. C.The per document cost of information processing will be reduced. D.The newest information will be easier to obtain.

是 否