患者女性，16岁，头晕、乏力半年，加重1个月入院。14岁月经初潮，共来过3次月经。月

男性，42岁，自幼起咳嗽、咳痰、喘息，多为受凉后发作，静滴"青霉素"可缓解，10～20岁无发作，20岁后又有1次大发作，发作时大汗淋漓、全身发紫、端坐不能平卧，肺部可闻及哮鸣音，静脉推注"氨茶碱、地塞米松"可完全缓解。此后反复出现夜间轻微喘息，每周发作3次以上，不能入睡，PEF变异率为35%。查体：双肺听诊未闻及干湿啰音，心率89次／分。

为了提高疗效，减少复发，教育患者需掌握（）。

A.正确使用气雾剂的方法

B.哮喘患者不发作可不用药

C.抗感染药治疗可根治哮喘

D.哮喘患者不发作不能使用激素

E.哮喘者需长期使用β₂受体激动剂

If your dog looks pleased to see you – it is probably because it loves the particular way you smell.

The odour of a familiar human apparently lingers like perfume in the animal’s brain – where it triggers an instinctive emotional response, research published yesterday reveals.

Our scent acts on a part of the canine brain associated with reward and the strongest reactions are produced by humans that pets know best, say scientists in America.

Gregory Berns, of Emory University in Atlanta, said: ‘While we might expect that dogs should be highly tuned to the smell of other dogs, it seems that the “reward response” is reserved for their humans.

'When humans smell the perfume or cologne of someone they love, they may have an immediate, emotional reaction that's not necessarily cognitive.

'Our experiment may be showing the same process in dogs. But since dogs are so much more olfactory(嗅觉的) than humans, their responses would likely be even more powerful than the ones we might have.

'It's one thing when you come home and your dog sees you and jumps on you and licks you and knows that good things are about to happen.

'In our experiment, however, the scent donors were not physically present.

Why do animals avoid pylons? Because they emit terrifying flashes of light that are INVISIBLE to humans.

Dolphins use sponges to protect their sensitive noses while foraging for food on the sea floor

'That means the canine brain responses were being triggered by something distant in space and time. It shows that dogs' brains have these mental representations of us that persist when we're not there.'

The university’s experiment - the first of its type - involved 12 dogs of various breeds who underwent brain scans while five different scents were placed in front of them.

The scent samples came from the subject itself, a dog the subject had never met, a dog that lived in the subject's household, a human the dog had never met, and a human that lived in the subject's household.

The familiar human scent samples were taken from someone else from the house other than the handlers during the experiment, so that none of the scent donors were physically present.

The results showed that all five scents elicited a similar response in parts of the dogs' brains involved in detecting smells. Responses were significantly stronger for the scents of familiar humans, followed by that of familiar dogs.

The findings, which were published in the journal Behavioural Processes, showed that dogs reacted strongest to the scent of a familiar human even when they were not there.

Pets trained as help or therapy dogs showed greater brain activity than the other dogs in the test.

Researchers say the findings could improve the way animals who assist wounded veterans or disabled people are selected.

小题1:Why does your dog look pleased to see you ?

A．because your dog wants to play with you

B．because your dog is hungry

C．because your dog wants to attract your attention

D．because your dog loves the particular way you smell.小题2:What’s the purpose of Emory university’s experiment ?

A．To study dog’s reaction while five different scents were placed in front of them.

B．To learn how to get along well with dogs

C．To know how to tell the difference between dogs

D．To improve the way animals who assist wounded veterans or disabled people are selected.小题3:According to the passage, a dog will be most interested in____.

A．familiar dogs

B．a human the dog had never met

C．a dog the dog had never met

D．familiar humans小题4:Which of the following is true according to the passage?

A．The dog’s olfactory responses would likely be even more powerful than the ones we might have.

B．In our experiment, the scent donors were physically present.

C．Dogs reacted strongest to the scent of a familiar human even when they were there.

D．Dog’s brain responses were not being triggered(引发) by something distant in space and time.

用力推课桌下部，课桌会移动，推上部可能翻倒，这说明力的作用效果

A．与力的大小有关

B．与力的方向有关

C．与力的作用点有关

D．与受力面积有关

烧伤后减少或降低败血症发生哪项措施不合适（）

A.提高病人免疫力

B.早切痂

C.有效地抗休克

D.早植皮

E.大面积烧伤创面等待自然愈合