什么是断裂长度？
If a diesel engine is smoking excessively under load, the cause could be （） ["low exhaust back pressure","early fuel injection in one of the cylinders","compression pressure in one of the cylinders","plugged injector hole"]
消费者甲因乙媒体上发布的丙企业的虚假广告而受损害，消费者甲可以向谁要求赔偿（） ["应向丙求偿","应向乙求偿","应向丙、乙求偿","如找不到丙企业，则不能求偿","如找不到丙企业，则向乙求偿"]
厂修客车车下配线须详细检查，无异状者，每隔（）抽线1次，并记录在客车技术履历簿内。 ["1年","2年","3年","1个厂修"]
A diesel engine emits blue exhaust smoke as a result of（） ["cold intake air","excessive compression pressure","excessive cylinder lubrication","a light load"]
甲板室为什么要设置伸缩接头？
