Researchers have confirmed that there are several effective methods for cleaning the N95 masks worn by health professional so that they can be used more than once,the National Institutes of Health announced Wednesday.
A research already showed that the masks,designed for one-time use,can be reused in a crisis.And the Centers for Disease Control and Prevention in March authorized reuse because of shortages driven by the Covid-19 pandemic.
None of these rules or methods are intended for the cloth masks recommended or in some locations required for use by everyone in public.
Earlier research had not,of course,involved the new coronavirus.The new research determined which cleaning procedures were most effective.
N.I.H.publicized the study because it could be helpful to health care professionals in the crisis.Dr.Munster and his colleagues tested four methods of killing the virus:UV light,dry heat, vaporized hydrogen peroxide(YHP)(汽化过氧化氢)and ethyl(乙醇)alcohol.Of those methods,they did not recommend ethyl alcohol because although it killed the virus,it degraded the mask material.
Vaporized hydrogen peroxide,a method often available in large hospitals,was effective, and left the masks still functioning for at least three rounds of cleaning,as did UV light.
Dry heat,at 70C,was effective,but the masks withstood only two rounds of cleaning.Dr. Munster said that"vaporized hydrogen peroxide would be the method of choice if that's available."However,he said,a nursing home might not have that,while for dry heat,what's needed is basically an oven.
Another recent study from Canadian researchers confirmed the value of cleaning.It included masks of different brands and found that the material of the mask was still effective after 10 rounds of vaporized hydrogen peroxide cleaning.
The findings are intended to be useful for health care workers wearing N95 masks.With personal protective equipment in short supply at many overwhelmed hospitals,some front-line workers have complained that masks were rationed.
The public has been advised not to use or try to buy N95 masks because they would be preventing health care workers from having lifesaving equipment.
1.Of the different cleaning procedures of N95 masks,which one is the least effective?
A.UV light B.dry heat
C.vaporized hydrogen peroxide(VHP) D.ethyl alcohol
2.In a dictionary,the underlined word"ration”has the.following explanations.Which explanation do you think agrees with the context?
A.a fixed allowance of something that is scarce
B.the amount of something one normally has
C.to assign to someone for a particular purpose.
D.to restrict the distribution of something
3.What's the main idea of the passage?
A.The public has been advised not to use N95 masks.
B.The health care workers are in great need of N95 masks.
C.N.I.H.announced N95 masks can be reused if cleaned effectively.
D.Personal protective equipment is in short supply at many hospitals.
Creamy cooked White Beans
Ingredients
●1 tablespoon unsalted butter
●1 head garlic,cut into halves
●1 cup whole milk
●1 can chickpeas,with their liquid
●1 can white beans
●1 thyme sprig, 2 sage leaves or 1 bay leaf
●1/8 teaspoon ground nutmeg,allspice or gram masala
●Salt and black pepper
●4 slices crusty bread or thick toast
●Extra-virgin olive oil,for serving
●Freshly grated Parmesan,for serving
●Pepper flakes,for serving
Nutritional analysis(4 servings)
428 calories,9 grams fat;4 grams saturated fat;0 grams trans fat;2 grams monounsaturated fat; 2 grams polyunsaturated fat;68 grams carbohydrates;14 grams dietary fiber;9 grams sugars;21 grams protein;732 milligrams sodium.
Preparation
1.In a medium saucepan,melt the butter over medium-high heat.Add the garlic,cut side down,and cook until golden brown,I to 2 minutes.
2.Add the milk,chickpeas and their liquid,white beans,thyme and nutmeg and stir to combine.Season(加作料)generously with salt and pepper.When the mixture begins to bubble around the edges of the pan(you don't want it to come to a full boil),reduce the heat to low and let it boil gently,stirring occasionally,until it has thickened and tastes great to you,about 15 minutes.Season with salt and pepper,to taste.
3. Use a fork to remove the garlic halves from the beans.Set aside until cool enough to handle,then use the fork to remove the cloves from the skins.Spread the cloves on bread or toast.
4.Mash(捣烂)some of the beans using the back of a spoon.Serve beans and milk in bowls.Serve with the bread alongside for dipping.
1.Which of the following steps of the cooking process is correctly stated?
A.The first step is to melt the salted butter in a medium saucepan.
B.Add little salt and pepper so that the mixture of ingredients tastes good.
C.Turn the heat from medium-high to low before the mixture fully boils.
D.The last step is to mix the beans,milk and bread and serve them in bowls.
2.A person will bum about 400 calories if jogging for an hour.To consume the calories produced when having the dish,you'll have to run for about
A.15 minutes B.half an hour
C.an hour D.one hour and a half
Days after New Jersey residents were ordered to stay at home last week because of the coronavirus,Sandy and John Driska were running _________on groceries.Then Sandy Driska, 72, hear through a friend that an acquaintance who _______ the local newspaper,found a typed note _______up in her morning paper.
“My name is Greg Dailey and I deliver your newspaper every morning,"the note _______.” I understand during these _______times it is difficult for some to get out of their house to get everyday _______I would like to offer my services_______to anyone who needs groceries."
It included his phone number.She was skeptical,but she_______anyway because she was feeling desperate.Sandy said,"I called Greg,and he delivered$302 of groceries to the front of my garage the very next day without charging me a penny _______”
Dailey,50,is a self-described"shy guy".But when he noticed that an older customer didn't want to walk down to the sidewalk to __________her morning newspaper after the coronavirus pandemic arrived,it made him think there must be plenty of people on his __________who were afraid to leave their home-even for groceries.
Some grocery stores deliver,but it can__________days or weeks.Customers have to figure out how to__________their orders online,which can be__________ ,and then there are delivery __________to pay,a financial__________ for many.
Dailey sat down at his computer and typed out a(n)__________ to shop for all 800 of his newspaper customers and __________else in his delivery area that might need a little help.
A few days ago,he received another thank-you note from a longtime subscriber,"You're the __________thing to an angel I've ever seen.”
"Do you know what that does to your heart? I just __________,"Dailey said.
1.A.low B.high C.small D.large
2.A.contributed to B.subscribed to C.applied to D.submitted to
3.A.rolled B.pulled C.wound D.cleared
4.A.wrote B.spoke C.read D.warned
5.A.inspiring B.boring C.consuming D.trying
6.A.loads B.products C.necessities D.packages
7.A.for good B.for certain C.for once D.for free
8.A.reached out B.got out C.gave out D.found out
9.A.less B.fewer C.more D.higher
10.A.take up B.pick up C.give up D.put up
11.A.avenue B.approach C.route D.lane
12.A.spend B.take C.cost D.charge
13.A.put B.place C.set D.send
14.A.conflicting B.convincing C.contradicting D.confusing
15.A.fares B.tips C.expenses D.fees
16.A.hardship B.shortcoming C.depression D.disorder
17.A.invitation B.recommendation C.request D.offer
18.A.something B.anything C.anyone D.no one
19.A.dearest B.closest C.furthest D.highest
20.A.melted B.froze C.hardened D.frightened
—My interview is in the afternoon.I am so nervous.
—You've prepared so well._____________.
A.Have butterflies in your stomach B.Be as sly as a fox
C.Interviews are battlefields D.Success is yours for the taking
This amusement park with all the exciting rides and other fun activities_____also home to outdoor concerts every summer.
A.are B.have been C.is D.has been
—I am so frustrated that the house we______in for so many years was consumed by the fire.
—Come on.Look on the bright side.I feel lucky to have escaped in time.
A.would live B.had lived C.live D.have lived