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 _____10____ the wood breaks, and it can then absorb more ____11____, more safely.
The researchers believe the principle could be applied to any material____12____ example, to manufacture lighter and more protective packaging. It could ____13____ be used in car bumpers, crash barriers and armour for military vehicles, says Ulrike Wegst, ____14_____ the Max Plank Institute for Mental Research in Stuttgart. But she emphasizes that youd _____15_____ to to design the substance with the direction of force in mind. The direction of loading is crucial, she says.
1. A) for B) since C) in D) at
2. A) but B) although C) and D) despite
3. A) down B) over C) up D) into
4. A) discovered B) concluded C) found D) thought
5. A) no B) per C) each D) every
6. A) the idea B) it C) they D) the spruce
7. A) If B) Just C) Only D) Rarely
8. A) effected B) beaten C) slapped D) affected
9. A) behind B) beyond C) for D) intact
10. A) which B) where C) that D) there
11. A) water B) air C) energy D) safety
12. A) among B) in C) as D) for
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