单选题
发布日期:2021-03-22
Worn intake valve guides
Pitted pre-combustion chambers
Loose valve tappets
High exhaust back pressure
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下列各项中,可用作绩效审计评价标准的有( )。[2010年中级真题]
一侧胸腔积液的表现是()
半金属垫片
使胰蛋白酶原活化的最重要物质是( )。
在原子发射光谱中,具有灵敏度高、检测限低、精密度好、线性范围宽的特别,适用于高含量、微量、痕量金属和难激发元素分析的是()
《铁路安全管理条例》第三十六条,在电气化铁路附近从事排放粉尘、烟尘及腐蚀性气体的生产活动,超过国家规定的排放标准,危及铁路运输安全的,由()以上地方人民政府有关部门依法责令整改,消除安全隐患。
高温退火适用于冷塑性变形而硬化的合金,其目的是消除加工(),恢复原来的机械性能。
()以上的高坡区段,禁止机车专列回送。
不等式组的解集是( ).
云闪包括()
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What does the SCN represent?()