题目内容（请给出正确答案）

[主观题]

An aluminum piston has lower inertia and higher coefficient of _____ compared to that of c

ast iron.

A.viscosity

B.twisting moments

C.inertia

D.thermal expansion

提问人：网友jnruankao 发布时间：2022-01-06

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第1题

Ring groove inserts are occasionally used on aluminum alloy piston to_______.A.reduce the

Ring groove inserts are occasionally used on aluminum alloy piston to_______.

A.reduce the ring groove wear rate

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第2题

In a two-stroke engine, the piston consists of a lower part, which is named as and usually

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第3题

Cold clearances between the skirt of an aluminum piston and the cylinder liner is about __

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第4题

An aluminum piston has lower inertia and higher coefficient of（）compared to that of cast iron

A．viscosity

B．twisting moments

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D．thermal expansio

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第5题

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A．pure metal

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第6题

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第7题

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第8题

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第9题

It is very common for fireworks to contain aluminum, iron, steel, zinc or magnesium dust.A

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第10题

（The metal) aluminum （has been) （first) isolated （early) in the nineteenth century.A．The m

(The metal) aluminum (has been) (first) isolated (early) in the nineteenth century.

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