主页
学科
搜索
账户
常见问题
当前学科：发电工(动力工)中级
题目：
单选
导致双燃料发动机汽缸进出口积碳过多的原因是（）。①滑油型号不对②喷嘴磨损③发动机过载④喷油时间不正确
A . ①③
B . ②④
C . ①②④
D . ①③④
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
政府采购具有的特点是（）。
回答题：ArchitectureArchitecture is to building as literature is to the printed word. The best buildings are often so well constructed that they outlast their original use. They then survive not only as beautiful objects， but as documents of the history of cultures. These achievements are never wholly the work of individuals. Architecture is a social art.The renaissance brought about an entirely new age， not only in philosophy and literature but in the visual arts as well. In architecture， the principles and styles of ancient Greece and Rome were brought back to life and reinterpreted. They remain dominant until the 20th century.Many kinds of stone are used as building materials. Stone and marble were chosen for important monuments because they are not burnable and can be expected to endure. Stone architecture was often blended with stone sculpture. The use of stone has declined， however， because a number of other materials are more adaptable to industrial use.The complexity of modern life calls for a variety of building. More people live in mass housing and go to work in large office buildings; they spend their income in large shopping centers， send their children to many different kinds of schools， and when they are sick they go to specialized hospitals and clinics. All theses different types of buildings accumulated experiences needed by their designers.By the middle of the 20th century， modern architecture， which was influenced by new technology and mass production， was dealing with increasingly complex social needs. Important characteristics of modern architectural works are expanses of glass and the use of reinforced concrete. Advances in elevator technology， air conditioning， and electric lighting have all had important effects.Paragraph 2_____________.
胃大部切除的患者出现严重贫血，表现为外周巨幼红细胞增多，其主要原因是下列哪项减少（）
甲公司与乙运输公司签订了多式联运合同，应甲要求，乙开具了可转让多式联运单据。甲隐瞒了所运物品为危险物等相关信息，也未履行妥善包装的义务，且不久就将这份合同转让给了丙公司。运输期间该物品发生自燃，导致运输工具损毁。对此，下列说法中正确的是（）。
要久存的食品要选用（）
距离上颌窦下壁最近的是哪颗牙（）
试分析不采用ECU控制的EGR系统的控制方式？
一个人作为权利和义务（尤其是政治权利与义务）主体的资格，这是（）
女性，30岁，被车撞击后当时无明显症状，几天后突然出现急性大出血的危险情况，其可能的原因是（）
功能分化