单选题
发布日期:2021-03-22
Large crosshead type;crossheads
High speed;the cylinders
Large crosshead type;the cylinders
Four-stroke;pistons and cylinders
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下列哪项不是四冲程发动机的行程?()
根据《铁路旅客运输规程》,旅客因伤、病不能继续旅行、经站车证实可按规定退票。
15岁,女,脑室动造瘘术前后的CT表现如图,请选择最可能的诊断()
在电路中,()都是从电源的一端出发,经过负载后,回到电源的另一端。
对于喷镀锌铝层而言,它同时具有防蚀和阴极保护作用,所以更能提高漆膜的耐腐蚀性能。
经济租金
Y形桥墩的优点之一是()。
甲亢131I治疗后注意()
下列属于一般疏散模拟需要输入的参数的是()。
导致滚动轴承车轴发热的原因不正确的是()
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