1. How did Helen contact the company?
A.By phone. | B.By email. | C.By letter. |
A.To work for a newspaper. | B.To look after children. | C.To serve in a phone company. |
A.The pay is good. | B.The place is fun. | C.The work is easy. |
1. What is John doing?
A.Doing a fun project. | B.Donating unwanted things. | C.Emptying the cupboard. |
A.A kind of old junk. | B.A way of recycling. | C.A travel website. |
A.A gorilla arm. | B.A bicycle. | C.A microphone. |
A.Spanish. | B.French. | C.Chinese. |
A.Have dinner with her classmates. | B.Watch her sister’s dog. | C.Go out of town. |
Japan is experiencing record heat. Last week, the temperature in eastern Japan
Japan’s heat wave is set to continue. The weather agency said that the country’s
6 . Counting stars is pretty difficult in areas with lots of light, like major cities. A study says even in the clearest skies, you’re still seeing turbulence (涡流) in the atmosphere that makes stars twinkle. Want a truly perfect view of outer space? An international research team has found the spot, but you’ll need to wrap up warm. It’s in Antarctica!
According to the University of New South Wales, turbulence causes light coming from stars to bend as it reaches the Earth’s surface. That instability( 不稳定) in the air makes stars twinkle.
The location in Antarctica, however, has so little turbulence that it hardly interferes (干扰) with the light from stars, making the view extraordinarily clear. The Chinese-led research team built a system of telescopes on the top of a plateau(高原), named Dome A, which sits 4,000 feet above sea level.
“Dome A is the highest point in the central plateau of Antarctica, and the atmosphere is extremely stable here, much more so than anywhere else on Earth,” says UNSW Professor Michael Ashley. “The result is that the twinkling of the stars is greatly reduced, and the star images are much sharper and brighter. In fact, this special place even has advantages over the famous Hubble Space Telescope.”
“Satellites are a lot more expensive,” the astronomer explains. “But another advantage of making Earth-based observations is that you can always add the latest technology to your telescope on the ground. In space, everything is delayed (延迟). So you end up with technology in space lagging that on the ground by 10 years or more.”
One of the biggest advantages Dome A’s location has is that winter nights in Antarctica are very long. In fact, scientists will be able to track stars continuously since some nights in midwinter last for almost 24 hours.
1. Why is the view of stars extraordinarily clear in Antarctica?A.Because stars appear bigger there. |
B.Because turbulence hardly exists there. |
C.Because there is little air pollution there. |
D.Because more light coming from stars arrives there. |
A.Based on. | B.Linked to. |
C.Competing with. | D.Falling behind. |
A.It sits 4,000 feet above sea level. |
B.It has very long winter nights there. |
C.The famous Hubble Space Telescope is there. |
D.Telescopes there are equipped with the latest technology. |
A.Business. | B.Environment. |
C.Science. | D.Tourism. |
7 . There have been so many improvements in detecting cancer from blood tests to virtual devices that can detect tumors(瘤) painlessly. Now, a new visual technology will allow doctors to detect skin cancers in just 10 seconds.
Researchers from Tel Aviv University (TAU) have come up with a new visual technology that can find out skin cancer without ever cutting into the patient’s body. Skin cancer detection has always been a long process of doing a traditional examination of harmful changes and then waiting for the results. But this new method is so fast that you can know the results instantly.
Early detection of melanomas (a kind of tumors) can save lives according to the researchers. If a melanoma is detected early, and removed right away, the chances for a full recovery are very good. This new technology is built upon the knowledge that harmful changes give off different colors when placed under special light that shows if they are fatal (致命的)and what type of cancer is present. Instead of removing the harmful changes for examination, the research team pioneered a way to check them on the body.
The research was published in the journal Medical Physics, saying the optical technology was tested on 90 patients and it accurately identified the 5 patients with melanoma and 10 with other skin cancers. In addition, 75 other patients that had harmful changes were correctly identified as cancer-free.
The next stage involves testing the technology on many more patients in the hope that it can be used to create an easy-to-use machine that will be able to find out harmful changes on a screen. The visual technology will have the potential to cause an immense change in the field of detecting and treating skin cancer, which increases survivability and the quality of life.
1. What is the advantage of the new method?A.It saves time. | B.It reduces costs. | C.It’s widely used. | D.It is well received. |
A.By its size. | B.By its shape. | C.By its color. | D.By its position. |
A.By comparison. | B.By giving examples. |
C.By listing causes. | D.By following the time order. |
A.Huge. | B.Insignificant. | C.Negative. | D.Unimportant. |
8 . Last week my four-year-old son Basti and I went for a walk in a park.
That evening, I came across a community post from a (n)
The next morning, I had to break the
The lovely toy was returned. Feeling unhappy, yet I thought we had made a good
A.Climbing | B.Crashing | C.Noticing | D.Approaching |
A.found | B.bought | C.mentioned | D.recognized |
A.brief | B.shallow | C.amazing | D.familiar |
A.bed | B.dining-room | C.workshop | D.kitchen |
A.awkward | B.anxious | C.energetic | D.frightened |
A.damaged | B.lost | C.rented | D.stolen |
A.happy | B.angry | C.excited | D.concerned |
A.calmed | B.invited | C.contacted | D.comforted |
A.news | B.effect | C.cup | D.letter |
A.contributing | B.holding | C.painting | D.washing |
A.borrowed | B.hid | C.loved | D.needed |
A.accept | B.recover | C.return | D.keep |
A.plan | B.contribution | C.promise | D.decision |
A.quickly | B.slightly | C.fortunately | D.actually |
A.pulled up | B.cheered up | C.responded to | D.belonged to |
A businessman stops to cut a rose at a garden for his daughter, Bella. But a
Bella has to go to his castle
A wise and wealthy man bought a beautiful house with a huge garden. However, not all people
One fine day, the wise man woke up in a good mood (情绪). He opened the gate and a big bag full of garbage