列车所受阻力大小与曲线半径无关。

[问答题]简述系统的生命周期的组成以及各阶段的工作内容。

[判断题]活塞环开口不能朝向活塞推力面处，也不能在活塞销孔对应的位置上。

[判断题]下贝氏体比上贝氏体的硬度高。

[判断题]冬季停车，冻坏气缸预防措施：冬季长期不开时，应将各段冷却水及气缸夹套内水排放干净，要从最下处排放。

[单选题]综合监管体制与分业监管体制是从()的角度进行分类的。

[判断题]企业处置投资项目按税法规定确认为损失的在《投资收益纳税调整明细表》（A105030）中调整。

[判断题]由于软盘引导扇区损坏或病毒的原因，软驱在读取盘中数据时也会出错。

[单选题]当长度变形值不大于2.5cm/km，工程施工控制网所采用的坐标系统方案是（）。

[单选题]请阅读 Passage 2，完成第 26~30小题。Passage 2 The common cold is the world's most widespread illness， which is plague that flesh receives.The most widespread fallacy of all is that colds caused by cold.They are not， They are caused by viruses passing on from person to person.You catch a cold by coming into contact， directly or indirectly， with someone who already has one.If cold causes colds， it would be reasonable to expect the Eskimos to suffer from them forever.But they do not.And in isolated arctic regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.During the First World War soldiers who spent long periods in the trenches， cold and wet，showed no increased tendency to catch colds.In the Second World War prisoners at the notorious Auschwitz concentration camp， naked and starving， were astonished to find that they seldom had colds.At the Common Cold Research Unit in England， volunteers took part in Experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time.After taking hot baths， they put on bathing suits， allowed themselves to be with cold water， and then stood about dripping wet in drafty room.Some wore wet socks all day while others exercised in the rain until close to exhaustion.Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.If， then， cold and wet have nothing to do with catching colds， why are they more frequent in the winter? Despite the most pains-taking research， no one has yet found the answer， One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times， and this makes it easier for cold viruses to be passed on.No one has yet found a cure for the cold.There are drugs and pain suppressors such as aspirin， but all they do is relieve the symptoms.The author cites the Eskimos not suffering from common colds forever to indicate ____.

[单选题]甲公司为乙公司提供一项安装劳务活动，安装期限为2年，在第一年年末，提供劳务结果不能可靠估计，甲公司预计企业发生的劳务成本部分能够得到补偿，甲公司的下列做法正确的是（）。

[判断题]列车所受阻力大小与曲线半径无关。

[问答题]什么是列车的基本阻力？

[问答题]什么叫列车阻力？

[名词解释题]列车阻力

[单选题]属于列车受到的基本阻力是（）。

[问答题]什么叫列车阻力？

[单选题]属于列车受到的基本阻力是（）。

[问答题]什么是列车的基本阻力？

[名词解释题]列车基本阻力

[名词解释题]列车阻力