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往年中国石化招聘考试试题分享一

2019-10-30 13:54:51 | 来源:吉林国企招聘网

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阅读下面的短文,文中有10处空白,每处空白给出了4个选项,请根据短文的内容从4个选项中选择1个最佳答案。

Less Is More

It sounds all wrong--drilling holes in a piece of wood to make it more resistant to knocks.But it works because the energy from the blow gets distributed throughout the wood rather than focusing on one weak spot.The discovery should lead to more effective and lighter packaging materials. Carpenters have known ( 1 ) centuries that some woods are tougher than others. Hickory(山核桃木),for example,was turned into axe handles and cartwheel spokes(轮辐)because it can absorb shocks without breaking.White oak,for example,is much more easily damaged,although it is almost as dense.Julian Vincent at Bathe University and his team were convinced the wood’s internal structure could explain the differences.

Many trees have tubular(管的)vessels that run ( 2 ) the trunk and carry water to the leaves.In oak they are large,and arranged in narrow bands,but in hickory they are smaller,and more evenly distributed.The researchers thought this layout might distribute a blow’s energy throughout the wood.soaking up a bigger hit.To test the idea,they drilled holes 0.65 millimeters across into a block of spruce(云杉),a wood with ( 3 ) vessels,and found that it withstood a harder knock.( 4 ) when there were more than about 30 holes per square centimeter did the wood’s performance drop off.

A. uniform substance doesn’t cope well with knocks because only a small proportion of the material is actually affected .All the energy from the blow goes towards breaking the material in one or two places,but often the pieces left ( 5 ) are pristine (未经破坏的) .But instead of the energy being concentrated in one place,the holes provide many weak spots that all absorb energy as they break,says Vincent.“You are controlling the places where the wood breaks,and it can then absorb more ( 6 ) ,more safely.”

The researchers believe the principle could be applied to any material- ( 7 ) example.to manufacture lighter and more protective packaging.It could ( 8 ) be used in Car bumpers,crash barriers and armor for military vehicles,says Ulrike West, ( 9 ) the Max Plank Institute for Mental Research in Stuttgart.But she emphasizes that you ( 10 ) to design the substance with the direction of force in mind.“The direction of loading is crucial,”she says.

(1)

A. in

B. since

C. for

D. at

(2)

A. down

B. over

C. up

D. into

(3)

A. no

B. per

C. each

D. every

(4)

A. if

B. Just

C. Only

D. Rarely

(5)

A. behind

B. beyond

C. for

D. in

(6)

A. water

B. air

C. energy

D. safety

(7)

A. among

B. in

C. as

D. for

(8)

A. also

B. besides

C. else

D. yet

(9)

A. over

B. at

C. around

D. on

(10)

A. have

B. must

C. should

D. had

答案见下页


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