單項選擇題

如何與顧客保持良好的互動（）

A.在不影響下單的情況下，可以和顧客互動聊天增進感情，提高親和度，關(guān)系好了，下單就容易
B．適當?shù)陌l(fā)點紅包，記住不要發(fā)太多錢，別人還以為你能賺很多錢，但是也不能太少，顧客會說你太小氣，還有些顧客看你紅包太小都不會搶
C．可以在群里搞點小活動，下X單送XX，或者每天下單量最多的前X名，送XX，以此來吸引顧客下單
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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 _______ （51）centuries that some woods are tougher than others. Hickory， for example， was turned into axe handles and cartwheel spokes because it can absorb shocks without breaking. White oak， for example， is much more easily damaged， _______ （52） 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 vessels that run _______ （53） 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 _______ （54） 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 millimetres across into a block of spruce， a wood with _______ （55）vessels， and found that （56） withstood a harder knock. （57）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_______ （58）. All the energy from the blow goes towards breaking the material in one or two places， but often the pieces left_______ （59）are pristine（未經(jīng)破壞的）.
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 v（60） the wood breaks， and it can then absorb more _______ （61） ， more safely. "
The researchers believe the principle could be applied to any material _______ （62） example， to manufacture lighter and more protective packaging. It could _______ （63）be used in car bumpers， crash barriers and armor for military vehicles， says Ulrike Wegst， _______ （64） the Max Plank Institute for Mental Research in Stuttgart. But she emphasizes that you"d _______ （65） to design the substance with the direction of force in mind. "The direction of loading is crucial，" she says.
__________ 查看材料
A.for
B.since
C.in
D.at

A.
Carpenters
B.Many
C.65
D.
A
E.
But
F.
__________
G.for
B.since
C.in
D.at
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