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更多“The cells were Exposed to 5% carbon dioxide and 95% humidity at 37 °C, Then cultured in a 96-well pl…”相关的问题
A、Visceral mesoderm only
B、Visceral mesoderm and ectoderm
C、Endoderm and ectoderm
D、Visceral mesoderm and endoderm
Unpleasant(3)on my physical appearance were nothing new. Something inside me gave in to his idea that my legs were(4), and that became the last day that I ever willingly wore(5)until I was 30 years old. For the next 15 years, I spent summer after summer(6)in long pants.
But then I met Ragen Chastain, and she(7)everything. I couldn’t believe that this woman who, like myself, weighed almost 300 pounds was so(8)and happy in her own skin. I(9)as she shared her own journey to recovery and self-love. She talked about how amazing our(10)are, simply because of the things they do every day—like breathing, (11)blood to every cell, blinking and walking.
Walking! I was suddenly(12)how foolish I’d been for so long. There’re people who are born without legs, or who lack(13)working legs, or who lose their legs, and I’d been hiding my perfectly strong, healthy, beautiful legs(14) because I had (15) someone to convince me that they weren’t good enough. The next day, I bought three pairs of shorts and a sundress and spent the entire summer letting my legs(16) the sun and feel the breeze.
The next time anyone comments on your body in a(17)way, look them straight in the eye, smile and say, “If what you see(18) you so much, feel free to practice the ancient art of looking (19)else.” That’s Ragen’s own(20) , but I don’t think she’ll mind if you use it.
(1)A.small
B.slim
C.plain
D.thick
(2)A.eat
B.talk
C.walk
D.cry
(3)A.suggestion
B.comments
C.reports
D.reflection
(4)A.unacceptable
B.unnecessary
C.unique
D.special
(5)A.shorts
B.socks
C.pants
D.T-shirts
(6)A.driving
B.roasting
C.sleeping
D.running
(7)A.believed
B.changed
C.explained
D.solved
(8)A.energetic
B.generous
C.sensitive
D.tiresome
(9)A.expected
B.laughed
C.listened
D.waited
(10)A.bodies
B.legs
C.images
D.weights
(11)A.pulling
B.putting
C.preventing
D.pumping
(12)A.afraid of
B.absorbed in
C.anxious about
D.aware of
(13)A.accidentally
B.possibly
C.properly
D.regularly
(14)A.in delight
B.in shame
C.in panic
D.in pride
(15)A.begged
B.allowed
C.refused
D.invited
(16)A.avoid
B.cover
C.kick
D.see
(17)A.different
B.negative
C.normal
D.positive
(18)A.amuses
B.bothers
C.excites
D.hurts
(19)A.anywhere
B.somewhere
C.nowhere
D.everywhere
(20)A.decision
B.creation
C.question
D.requirement
A、looked for
B、asked for
C、was in lack of
D、disapproved of
A、must try to attract those who never use the Internet.
B、must collect everyone's credit card information.
C、must prevent customers' credit card information from being stolen.
D、must have branches.
When Bill de Blasio ran for New York City mayor last year, he promised to end a controversial （有争议的）, citywide cell-phone ban（禁令）in public schools, which is not equally enforced in all schools. Now, under his leadership, the city is preparing to end the ban. It will be replaced by a policy that allows phones inside schools but tells students to keep them packed away during class.
Many schools have a rule about enforcing the ban that says, “If we don't see it, we don't know about it.” That means teachers are OK with students bringing in cell phones, as long as they stay out of sight and inside bags and pockets.
But at the 88 city schools with metal detectors, die ban has been strictly enforced. The detectors were installed to keep weapon out of schools，but the scanners（扫描器）can also detect cell phones. So students at these schools must leave their phones at home or pay someone to store it for them.
The ban was put into place in 2007 under mayor Michael Bloomberg. Ending the ban will also likely end an industry that has sprung up near dozens of the schools that enforce the ban. Workers in vans（厢式货车）that resemble food tracks store teens' cell phones and Other devices for a dollar a day,
Critics of the ban say cell phones are important safety devices for kids during an emergency. They also say that enforcement of the ban is uneven and discriminatory. Where the ban is enforced, it puts a disadvantage on students who can't afford to pay to store their phones.
Before putting an official end to the cell-phone ban, city education officials are working on creating a new policy. It will include rules about not using the phones during class or to cheat on tests.
1. Which of the following is the main idea of the passage?
A. New York City will give financial aid to poor students.
B. New York City plans to restrict cell phone use in libraries.
C. New York City plans to install metal detectors in all public schools.
D. New York City will soon end a ban on cell phones in schools.
2. Students pay___________ a day to leave their cell phones in a van parked near their school.
A. a dollar
B. two dollars
C. five dollars
D. ten dollars
3. Metal detectors were installed in 88 city schools, mainly to keep ___________ out of schools.
A. cell phones
B. weapons
C. alcohol
D. drugs
4. The word discriminatory in Paragraph 5 probably means ___________.
A. necessary
B. tough
C. strict
D. unfair
5. According to the passage, which of the following statements is TRUE?
A. After the cell-phone ban is ended, students can use their phones during class.
B. The cell-phone ban is equally enforced in all public schools.
C. The cell-phone ban was put into place in 2008 under Mayor Bill de Blasio.
D. A phone-storage industry has appeared outside the 88 metal-detector campuses.
B.alter
C.modify
D.exchange
Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest to the antenna (天线 ). But whether that causes any harm is not clear, scientists at the National Institute of Health said at a conference last month, adding that the study will not likely settle concerns of a link between cell phones and brain cancer. "What we showed is glucose(葡萄糖metabolism(代谢)(a sign of brain activity) increases in the brain in people who were exposed to a cell phone in the area closest to the antenna," said Dr. Nora Volkow of the NIH, whose study was published in the Journal of the American Medical Association. The study was meant to examine how the brain reacts to electromagnetic fields caused by wireless phone signals.
Volkow said she was surprised that the weak electromagnetic radiation (电磁辐射）from cellphones could affect brain activity, but she said the findings do not shed any light on whether cellphones cause cancer. "This study does not in any way indicate that. What the study does is to show the human brain is sensitive to electromagnetic radiation from cell phone exposures. " Use of the devices has increased dramatically since they were introduced in the early 1955s, with about 5billion cell phones now in use worldwide.
Some studies have linked cell phone exposure to an increased risk of brain cancers, but a large study by the World Health Organization did not offer a clear answer to this. Volkow’s team studied 47 people who had their brain examined while a cell phone was turned on for 50 minutes and another while the phone was turned off. While there was no complete change in brain metabolism, they found a 7 percent increase in brain metabolism in the region closest to the cell phone antenna when the phone was on.
Experts said the results were interesting, but urged that they be understood with great care. " Although the biological significance, if any, of increased glucose metabolism from too much cell phone exposure is unknown, the results require further investigation," Henry Lai of the University of Washington in the U. S. and Dr. Lennart Hardell of University Hospital in Sweden, wrote in an article in JAMA. "Much has to be done to further investigate and understand these effects." They wrote.
According to the passage， which of the following is TRUE？ 查看材料
A.Cell phone use is dangerous
B.Cell phone use causes cancer
C.The human brain is an electromagnetic field
D.There are about 5 billion cell phone users in the world right now
A、1
B、0.5
C、0
D、can not determine
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