In winter, traffic accidents occur____ on the highway.

A． frequently B suddenly C usually D rapidly

[问答题]Study carefully the following graphs that shows the distribution of traffic

[试题]People suffering from accidents incurred at work or from occupational diseases receive preferential treatment by the social security service compared with those suffering from civil accidents and ordinary illnesses.

[单选题]We can conclude that accidents involving cars ______.A． happened most often in New York CityB． do not happen as often as they did in the early days of the autoC． have killed many more people since Mr Bliss was killedD． were always the driver's fault

[单选题]Accidents often [arisefrom] carelessness.A.result fromB.result inC.stand up

[单选题][A] evidence[B] accidents[C] adventures[D] events

[单选题]To prevent accidents, a drivers Ed car______.A． has a sign inside itB． has two sets of brakesC． can't run very fastD． is big enough to hold five persons

[单选题]当听到“TRAFFIC TRAFFIC”时，入侵飞机对本航空器（）？A .有潜在的碰撞威胁B .有真正的碰撞威胁

[单选题]Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.A . a shortened ignition delay periodB . a lean fuel/air mixtureC . excess fuel in the combustion chamberD . rapid vaporization of injected fuel droplet

[单选题]Bearing knocks are likely to occur from （）.A . less clearanceB . dirty lube oilC . overloadD . bearing wear

[单选题]Please see that suchan（）does not occur again.A . mistakeB . negligenceC . oversightD . carelessness