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概述影响烟草特有亚硝胺的因素及其降低途径?
混凝土施工利用电缆线、软管拖拉或吊挂振捣器时应防止刮伤。
以下哪一点不是弹响髋产生弹响的原因?()
下列选项中,( )可以不采用BOT方式。
常用的材料保养方法有()
水准测量十字丝视差存在的原因是由于目标在望远镜内形成的像没有落在十字丝平面上。
「田中さんの鞄は()ですか。」「これです。」
溃疡出现下列征象中,提示溃疡可能发生恶变的是()
未发生保险事故,被保险人或者受益人谎称发生了保险事故,向保险人提出赔偿或者给付保险金请求的,保险人有权解除合同,但要退还保险费。
颈外动脉()
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A common trouble with the fuel pump plunger or fuel valve spindle is ().
A common trouble with the fuel pump plunger or fuel valve spindle is ().
A common trouble with the fuel pump plungers or fuel valve spindle is ().
A common trouble with the fuel pump plungers or fuel valve spindle is ().
Failure of fuel injection is usually due to trouble in the ().
Failure of fuel injection is usually due to trouble in the ().
The fuel injection system is very important, so any trouble of it will () the op...
The fuel injection system is very important, so any trouble of it will () the op...
In common rail engines, the fuel is() before is injected into the cylinders.
In common rail engines, the fuel is() before is injected into the cylinders.