下列（）参数减小可提高柴油机的充量系数。
①进气温度；
②残余废气系数；
③柴油机转速；
④过量空气系数；
⑤进气阀开启提前角；
⑥进气压力。
| Time spent in a bookshop can be most
enjoyable, whether you are a book-lover or merely there to buy a book as a
present. You may even have entered the shop just to find shelter from a sudden
shower. But the desire to pick up a book with an attractive dust-jacket is
irresistible. You soon become absorbed in some book or other, and usually it is
only much later that you realize that you have spent far too much time
there. This opportunity to escape the realities of everyday life is, I think, the main attraction of a bookshop. There are not many places where it is possible to do this. A music shop is very much like a bookshop. You can wander round such places to your heart’s content. If it is a good shop, no assistant will approach you with the inevitable greeting: "Can I help you, sir" You needn’t buy anything you don’t want. In a book A. a book on ancient coins. B. a best-selling novel on brass-rubbing. C. a book that only vaguely interests you. D. a book that unexpectedly fascinates you. [填空题]如果钢轨完全被固定，不能随轨温变化而自由伸缩，则在钢轨内部产生应力，这种由于轨温变化而在钢轨内部产生的应力称为（ ）。
怎样理解世界文学这个口号？
怎样理解世界文学这个口号？ [判断题]因安全质量、环境保护、文明施工及信访维稳等方面的负面问题被省主要领导签批，或被国家行政主管部门、应急管理部门书面约谈、挂牌督办的定性为较大事故
A.正确 B.错误 [多选题]事务性通知可以用于（）。
A.任免或聘用国家机关工作人员职务 B.上级机关对下级就某一具体事项布置工作，交待任务 C.同级机关及不相隶属的单位之间就某一项具体工作的进行或某一具体问题的解决要求对方配合、协助办理 D.告之各有关方面周知的事项 [单选题]流行性斑疹伤寒常见的并发症是( )
A..脑炎 B..支气管肺炎 C..肺水肿 D..心肌炎 E..结核病 [单选题]下列阀门中,产生流体阻力较大的是( )。
A.球阀 B.旋塞阀 C.截止阀 D.隔膜阀 [单项选择]作业区域内人行安全通道宽度应大于（）m，且分隔线应清晰、准确。
A. 0.8 B. 0.9 C. 1 D. 1.2 [单项选择]风湿性心脏病二尖瓣狭窄随右心衰竭加重，下列表现会减轻的是（）
A. 肝脏肿大 B. 心率增快 C. 心尖区舒张期隆隆样杂音 D. 急性肺水肿发作 E. 胃肠道淤血症状 [多选题]安全风险,按照可能发生事故的危害程度,对应本规定的事故等级分为( )。
A.一般风险 B.较大风险 C.重大风险 D.特大风险 [单选题] 职代会实行届期制，公司职代会每届三年，各单位职代会每届五年，到期应当及时换届。( )
A.正确 B.错误 我来回答: 提交
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