题干

____是生物体结构和功能的基本单位.
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细胞

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When Pizza Saved a Life

    Almost every night for more than 10 years, Kirk Alexander, 48, ordered a late dinner from his local Domino's pizza store. Sometimes he would 1a salad, sometimes a pie, sometimes chicken wings. Then one day, he suddenly 2calling.

    “It has been 11 days,” Domino's general manager Sarah Fuller 3 with KATU. Com, “which is not like him.”

    Sarah had known Kirk since 2009. Many Domino's delivery 4regularly made the short trip to Kirk's 5, about six minutes away. She knew he worked from home, and that he rarely went outside. She 6knew that he had suffered health issues in the past. Something, Sarah worried, was 7.

    Around 1 a. m. on Sunday, May 8, Sarah sent delivery driver Tracey Hamblen to Kirk's house. Tracey 8Kirk's door as he had 9 times before and knocked. He could 10see the TV set and lights were on, but after several minutes, Kirk still didn't answer the 11. Tracey called Kirk's phone. The call went straight to voice mail.

    Tracey 12back to the store, where 911 was called, and soon officers were on their 13.

    When the police arrived at Kirk's house, they heard a man calling for help from inside. They 14the house, and found Kirk on the floor 15immediate medical attention after 16from what Sarah said was a stroke(中风). One day later, 17they might have been too late.

    Kirk was rushed to Salem Hospital, where he was 18in stable condition shortly after Sunday's 19rescue. Sarah and other store employees visited him.

    So is keeping an eye on regular 20part of Domino's business plan? Not really, says Sarah, “Kirk is a part of our family here,” she shared with KOIN. com, “We felt like we needed to do something to build a warmer world.”

同类题5

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Tail Spin

    Two dolphins race around in a big pool in the Ocean Park. The smaller dolphin Grace, shown off a few of her tricks, turning around and waving hello to the crowd. The most amazing thing about her, however, is that she's even swimming at all. She doesn't have a tail.

    Grace lost her tail as a baby when she got caught up in a fish trap. When the dolphin arrived at the Ocean Park in December 2005, she was fighting for her life. “Is she going to make it?” Her trainer, Abbey Stone, feared the worst. Grace did make it --- but her tail didn't. She ended up losing her flukes and the lower part of her peduncle.

    Over the past six years, she has learned to swim without her tail. Dolphins swim by moving their flukes and peduncle up and down. Grace taught herself to move another way---like a fish! She pushed herself forward through the water by moving her peduncles from side to side.

    The movement put harmful pressure on Grace's backbone. So a company offered to create a man-made tail for her. The tail had to be strong enough to stay on Grace as she swam but soft enough that it wouldn't hurt her.

    The first time Grace wore the artificial tail. She soon shook it off and let it sink in the bottom of the pool. Now, she is still learning to use the tail. Some days she wears it for an hour at a time, others not at all. “The tail isn't

necessary for her to feel comfortable,” says Stone, “but it helps to keep that range of motion(动作) and build muscles(肌肉).”

    Now, the dolphin is about to get an even happier ending. This month, Grace will star in Dolphin Tale, a film that focus on her rescue and recovery. Her progress has inspired more than just a new movie. Many people travel from near and far to meet her. Seeing Grace swim with her man-made tail gives people so much courage.

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