As infants, we can recognize our mothers within hours of birth. In fact, we can recognize the {#blank#}1{#/blank#} of our mother's face well before we can recognize her body shape. It's {#blank#}2{#/blank#} how the brain can carry out such a function at such a young age, especially since we don't learn to walk and talk until we are over a year old. By the time we are adults, we have the ability to distinguish around 100,000 faces. How can we remember so many faces when many of us find it difficult to {#blank#}3{#/blank#} such a simple thing as a phone number? The exact process is not yet fully understood, but research around the world has begun to define the specific areas of the brain and processes {#blank#}4{#/blank#} for facial recognition.

Researchers at the Massachusetts Institute of Technology believe that they have succeeded in {#blank#}5{#/blank#} a specific area of the brain called the fusiform face area (FFA), which is used only for facial recognition. This means that recognition of familiar objects such as our clothes or cars, is from {#blank#}6{#/blank#} in the brain. Researchers also have found that the brain needs to see the whole face for recognition to take place. It had been {#blank#}7{#/blank#} thought that we only needed to see certain facial features. Meanwhile, research at University College London has found that facial recognition is not a single process, but {#blank#}8{#/blank#} involves three steps. The first step appears to be an analysis of the physical features of a person's face, which is similar to how we scan the bar codes of our groceries. In the next step, the brain decides whether the face we are looking at is already known or unknown to us. And finally, the brain furnishes the information we have collected about the person whose face we are looking at. This complex {#blank#}9{#/blank#}is done in a split second so that we can behave quickly when reacting to certain situations.

根据语境，用方框中所给短语的适当形式填空。（每个短语仅使用一次）

Measles (麻疹) breaks out in the Northwest

    The U.S. is experiencing outbreaks of measles, a disease it had declared eliminated years ago, largely due to a drop in vaccination (接种疫苗) rates in some communities.

    An outbreak in Washington state has sickened 23 people this month, mostly children under 10. Local health officials in Clark County, declared a public-health {#blank#}1{#/blank#} on Friday. They also urged residents to track {#blank#}2{#/blank#} symptoms and call ahead before heading to medical centers.

    State officials announced the {#blank#}3{#/blank#} of measles from the U.S. in 2000, thanks to a widespread vaccination program. But travelers entering the country with measles, as well as dropping vaccination rates in some states in recent years, has led to a rise in infection. Last year, there were a total of 17 outbreaks, {#blank#}4{#/blank#} as three or more cases linked together, according to the Centers for Disease Control and Prevention. New York and New Jersey {#blank#}5{#/blank#} for roughly half of the 2018 cases. The Clark County outbreak began early last week with three confirmed cases and has since grown to 23 confirmed and two more {#blank#}6{#/blank#}. Of those cases, 20 were unvaccinated and the others are unconfirmed.

    Measles is highly {#blank#}7{#/blank#}; the virus spreads through the air by coughing or sneezing, the CDC says. Early {#blank#}8{#/blank#} include a high fever, cough, runny nose and red, watery eyes, followed by tiny, white spots inside the mouth and the red, bumpy rash (疹子) that people {#blank#}9{#/blank#} associate with the infection. Children younger than 5 or adults older than 20 are more likely to suffer from complications, according to the CDC.

    In order to prevent the further spread of the outbreak, local health officials are posting times and places where residents may have been exposed. They are urging residents who haven't been vaccinated to {#blank#}10{#/blank#} whether they have been exposed and to take appropriate action.