The abbreviation BDC means （）.

[单选题]The abbreviation TDC means （）.A . top dead centerB . temperature difference centerC . time delay dockD . top diesel company

[单选题]The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as（）.A . ignition ratioB . power ratioC . compression ratioD . injection ratio

[单选题]The distance from TDC to BDC of the diesel engine is called （）.A . gapB . clearanceC . radiusD . stroke

[单选题]VIT means （）A . variable injection timingB . variable inlet tonnageC . vertical incoming tonnageD . vertical inlet tank

[单选题]在LFP900系列中BDC符号为（）。A .对称故障振荡闭锁开发元件B .不对称相继速动保护C .双回线相继速动保护

[单选题]（ ） means that the seller delivers when the goods， once unloaded from the a

[单选题]（ ） means that the seller delivers when the goods， once unloaded from the a

[单选题]The word “ uncertained ” means _________ .A． 相同的 B. 犹豫的 C. 令人满意的

[单选题]The word “ pouch ” means ________ .A． 育儿袋 B. 肌肉 C. 尾巴

[单选题]If a seaplane is not used as a means of transpiration on water but is capable of being used so，it shall ().A．be regarded as a vessel not under commandB．be regarded as a vessel underwayC．be regarded as a vesselD．be regarded as a sailing vessel