单选题
发布日期:2021-03-22
spark from a plug in the pre-combustion chamber
electrical discharge from the distributor
heat of compression within the cylinder
heat from the fuel injection nozzle
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下列关于IEEE 802.11标准的描述中,错误的是( )。
发票应按业务发生时间顺序、逐栏、全部联次一次性如实开具,并加盖()。
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证券投资基金初创阶段,在类型上以封闭式基金为主。
以下无机结合料稳定土中:①石灰稳定粗粒土; ②水泥稳定中粒土; ③石灰水泥稳定细粒土; ④石灰粉煤灰稳定粗粒土; ⑤水泥粉煤灰稳定中粒土; ⑥水泥稳定粗粒土,击实试验中混合料拌和时间超过1h。 不能再进行击实试验的有()。
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垄断竞争
平面调车变更股道时,可不停车传达。
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