问题
单项选择题
先心病X线检查，胸片主动脉弓呈3字征的是（）
A.肺动脉瓣狭窄
B.主动脉瓣狭窄
C.房缺
D.室缺
E.动脉导管未闭
答案
参考答案：B
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先心病X线检查，胸片主动脉弓呈3字征的是（）
A.肺动脉瓣狭窄
B.主动脉瓣狭窄
C.房缺
D.室缺
E.动脉导管未闭
参考答案：B
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| Every December, our nation's roads and skies are filled with travellers during the holidays. Many of those travellers will 1 their pets at home, perhaps because the animals are more 2 inside their familiar walls than at a boarding kennel (狗的临时寄养所). For those pets who 3 the comforts of home to travelling, you ought to consider finding a pet sitter. A pet sitter offers benefits to you and your pet, but 4 you choose wisely. It's important to know what to 5 when selecting someone for the job. Pet sitters do much 6 than provide your pet with food and water while you're away from home. A good pet sitter 7 spends quality time with your pet, gives him exercise, and knows how to tell if your pet needs the vet's attention. 8 , pet sitters usually offer additional services, 9 receiving mails and newspapers, watering plants, turning lights on and off, and providing with a lived-in look to avoid break-ins. When you 10 be away from home 11 travel for example-and don't want to leave your pet in a boarding kennel, who takes care of your pet? If you're like many other pet 12 , you ask a friend or neighbor to stop in and pour some soup and water in your pet's bowls. But is this the best for your pet? There's a good 13 that your friends and neighbors do not have proper pet-care experience and have even forgotten to 14 . They may also hate frequent requests to look after your pet while you're gone. So what is the solution? Consider hiring a "pet sitter"-a professional, qualified person 15 to care for your pet. A pet sitter offers both you and your pet many benefits. | ||||
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