Hawking raised concerns about AI that super-intelligence may eventually ruin mankind. （）

A . the cargo fall B . The cargo hoisting wire rope C . the topping lift D . the cargo whi

A . 正确 B . 错误

A . uncorrected KG B . virtual height of the center of gravity C . metacenter D . metacentric height

A . Extend arm with the thumb pointing up and flex the fingers in and out B . Place both fists in front of the body with the thumbs pointing upward C . With forearm vertical and forefinger pointing up,move hand in small horizond circles D . Extend arm with the fingers closed and thumb upward

A . persisteD B . insisted C . resisted D . suggested

A.author of best seller B.British mathematician C.born in Oxford D.theoretical physicist

A．persisted B．insisted C．resisted D．suggested

A.Right B.Wrong C.Not mentioned

A、was B、 were C、has been

A．charges launched against its head. B．its merging with the Customs Service. C．other security recommendations. D．its separation into two bodies.

We don't know what the effects would be on healthy human cells, Marinelli told New Scientist magazine. In the Italian study, after 24 hours 20 percent more leukemia cells died than healthy cells but longer exposure to the radio waves triggered genes in the surviving cancer cells to divide aggressively. The results of the study do not show any direct threat to human health but they support the belief of some scientists who say radiation can damage DNA and destroy the cell repair system, thus making tumors more deadly. But animal studies, including recent research by Australian scientists at the Institute of Medical and Veterinary Science in Adelaide, have shown that radiation from mobile phones does not trigger the growth of tumors. The WHO (i.e., The World Health Organization) has called for more research into the potential health hazards of mobile phones and has urged people to limit their use of them. A British government inquiry, which concluded that there was no evidence that mobile phones are a danger to health, has advised parents to discourage their children, whose brains are still developing, from using them excessively. What is the speaker's main topic？ A．Effects of using mobile phones on healthy human cells. B．Risks of developing cancer involved in the use of mobile phones. C．Damage to healthy cells caused by the use of mobile phones. D．The potential health hazards of mobile phones on humans.

A、<p>看法</p> B、<p>情况</p> C、<p>职位</p> D、<p>放在</p>

A．a moral duty B．a thankless job C．a rewarding task D．a source of inevitable pain

A．Workers are all paid by the day. B．Someone who has an experience gets high pay. C．There is no pay check for the first few months. D．It depends on how the graduate nurses do on their jobs.

A．A.who B．B.that C．C.in which D．D.of which

A．make B．collect C．store D．save