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Find Your Adventure at the Space and Aviation ( 航空)Center If you&39;re looking for a unique adventure, the Space and Aviation Center(SAC)is the place to be. The Center offers programs designed to challenge and inspire with hands-on tasks and lots of fun.
More than 750, 000 have graduated from SAC, with many seeking employment in engineering, aviation,education, medicine and a wide variety of other professions. They come to camp, wanting to know what it is like to be an astronaut or a pilot, and they leave with real-world applications for what they&39;re studying in the classroom.
For the trainees ，the programs also offer a great way to earn merit badges(荣誉徽章). At Space Camp, trainees can earn their Space Exploration badge as they build andfire model rockets, learn about space tasks and try simulated ( 模拟) flying to space withthe crew from all over the world. The Aviation Challenge program gives trainees the chance to earn their Aviation badge. They learn the principles of flight and test theiroperating skills in the cockpit( 驾驶舱)of a variety of flight simulators. Trainees alsoget a good start on their Wilderness Survival badge as they learn about water-and land-survival through designed tasks and their search and rescue of “downed"pilot.
With all the programs, teamwork is key as trainees learn the importance ofleadership and being part of a bigger task.

A.oursac.com.
B.To
C.
B.To
D.
C.To
E.
D.To
F.
To
G.A.fly
H.
B.get
I.
C.study
J.
D.build
K.
What
L.Leadership.
B.Team
M.
C.Task
N.
D.Survival
O.

【参考答案】

问题 1 解析：A
问题 2 解析：D
问题 3 解析：B

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Plastic-Eating WormsHumans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills( 垃圾填埋场)， and up to 12 million tons pollute the oceans. qSo farthere is no effective way to get rid of it, but a new studysuggests an answer may lie in the stomachs of some hungry worms.Researchers in Spain and England recently found that the worms of the greater waxmoth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and theworms consumed and broke down about 92 milligrams, or almost 3% of it. To confirmthat the worms&39; chewing alone was notresponsible for the polyethylene breakdown, the researchers made some worms into paste( 糊状物)and applied it to plastic films. 14hours later the films had lost 13%of their mass--apparently broken down by enzymes( 酶)from the worms&39;stomachs. Their findings were published in Current Biology in Federica Bertocchini, co-author of the study, says the worms&39;ability to break downtheir everydayfood-beeswax--also allows them to break down plastic Wax is acomplex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, she explains. The wax worm evolved a method or system to break this bond. Jennifer Debruyn, a microbiologist at the University of Tennessee, who was notinvolved in the study, says it is not surprising that such worms can break downpolyethylene. But compared with previous studies, she finds the speed of breakingdown in this one exciting. The next step, DeBruyn says, will be to identify the cause ofthe breakdown. Is it an enzyme produced by the worm itself or by its gut microbes( 肠道微生物)? Bertocchini agrees and hopes her team ’s findings might one day help employ theenzyme to break down plastics in landfills. But she expects using the chemical in somekind of industrial process-not simply millions of worms thrown on top of the plastic. ”What can we learn about the worms in the study?