题干

肠道病毒EV71常引起儿童手足口病、病毒性咽喉炎。下列关于人体对该病毒免疫过程的说法正确的是                                                 

A:EV71侵入机体后经T细胞摄取处理,暴露出EV71所特有的抗原

B:效应T细胞能通过释放淋巴因子攻击被EV71入侵的细胞

C:患儿痊愈后若再次感染该病毒,相应的记忆细胞会迅速产生抗体消灭病毒

D:患儿感染EV71后,需体液免疫和细胞免疫共同作用才能彻底清除

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D

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    A cat is recovering in California after surviving a 6,500-mile journey across the Pacific stowed inside a Chinese shipping container without food or water. Staff and volunteers have named it “Ni Hao”, which is Chinese for “hello”.

    It was discovered breathing shallowly after a two-week trip across the Pacific Ocean. The cat was seriously suffering from loss of water and starvation when the container was opened in California last week, but was said to be doing well after being sent to the Carson Animal Care Centre in Los Angeles. At first it was too weak to stand, but finally took its first steps. Then it ate a good meal and slept soundly. The cat woke up on Thursday morning, physically in a better condition than 24 hours ago.

     “Ni Hao greeted the medical team with its first meow this morning and is attempting to stand,” said Marcia Mayeda, head of the Los Angeles Department of Animal Care and Control. Aaron Reyes, director of the Department, added, “We finally got to hear its voice. It sounds like a single-engine plane.”

    Ni Hao is expected to be observed for 60 days but afterwards animal workers will look forward to providing it with a good shelter. “It's much better for it to recover in a home environment,” Mr. Reyes said. “It's just like a human being in a hospital so we're hoping to move it.” He added, “Little by little we're getting there. We're hoping that under the treatment and with rest, it'll be able to recover quickly.”

    It was not immediately clear how the cat got into the container.