If plastic film insulation becomes damaged in air conditioning system, （） may form within the film...

第1题

[单选题] If you must make an electricity connection in a poorly accessible spot, solder it and seal it against （）

A、metal B、wood C、water D、plastic

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第2题

[单选题] If Annex V to MARPOL 73/78 applies to your vessel，you willnot be able to discharge（）anywhere at sea.

A、plastic B、metal C、glass D、paper

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第3题

[单选题] In（）each year the National Film Theatre hosts the London Film Fes-tival,at which some 250 new films from all over the world are screened.

A、September B、October C、November D、December

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第4题

[单选题] Under the Pollution Regulations，when you dump garbage in to the sea you must（）.

A、notify Coast Guard or MSA B、make an entry in the Official Logbook C、keep a record for two years D、No action is required if you are more than 25 miles fromland and no plastic materials are dumped

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第5题

[单选题] If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）

A、alternation of side thrust B、a breakdown of the lube oil film on the cylinder wall C、worn piston boss piston pin bearings D、fluctuating gas pressure in the combustion space

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第6题

[填空题] I （） to see a film with my brother last night. (【go】　　我昨晚和哥哥去看电影了。

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第7题

[单选题] If over a period of time, the oi1 film partially disappears, so that dry areas are formed on the cylinder wall, these areas and the piston surfaces will by frictional interaction, become finely scuffed and hardened, iegood mirror surface" will have deterioratedWhat condition of the piston rings can result in this phenomenon?（）

A、micro-seizure B、sticking C、scratched D、breakage/collapse

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第8题

[单选题] 测深管（）

A、sounding pipe B、steel pipe C、plastic pipe D、wooden pipe

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第9题

[单选题] mRNA与30S亚基复合物与甲酰甲硫氨酰-tRNAf结合过程中起始因子为（）

A、IF1及IF2 B、IF2及IF3 C、IF1及IF3 D、IF1、IF2及IF3

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If plastic film insulation becomes damaged in air conditioning system, （） may form within the film.

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