[简答题]Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy.

[简答题]Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy.

[简答题]Many scientists believe that our species ____________(有朝一日会濒临灭绝).

[填空题]Scientists believe that by raising atmospheric pressure and surface temperature, it is possible to transform the climate of Mars to the point where humans would be able to live there. The process by which a hostile or unsuitable environment is transformed into one that can sustain human life is called terraforming. In addition to potentially providing an alternate home for the people of Earth in the future, this undertaking may also allow scientists to test hypotheses about the process of global warming, which is a highly pertinent issue affecting our planet today.
Which of the following can be inferred from the passage regarding the Martian atmosphere
A. A．It has a lower pressure than Earth’s atmosphere.
B．It has a higher surface temperature than Earth.
C．It can most certainly be transformed to be more like Earth’s atmospher

[填空题]Scientists believe that uranium was absorbed by the Earth when it was formed.

[填空题]Scientists believe that the things people do that send ______ gases into the air are making our planet warmer.

[简答题]Some scientists believe that yawning is just to make us______.

[填空题]Many scientists believe biotech __________________________.(生物技术能够把发展中国家的农业总产量提高25%)

[填空题]Scientists believe that ___________________ (用脑越多，思维就越活跃).

[单项选择]

Scientists who believe cell phones are dangerous have been throwing out hypotheses to explain away the negative results. Maybe something about the (34) animals raised their rates of cancer or sperm problems, so (35) the exposed animals didn’t seem to be harmed. Maybe the studies should have used pulsed, (36) radiation rather than a continuous beam, the better to (37) the way we actually use mobile phones. Maybe it matters (38) the lab animals are zapped (39) in a device like a Ferris wheel or while (40) around in cages. On the other hand, if these details do (41) , maybe that in itself is significant.
Scientists who (42) claims that cell-phone radiation is causing an epidemic of brain cancer (43) that there isn’t any mechanism. (44) textbook biophysics, only radiation that has enough energy to ionize molecules—that is, knock off electrons—can (45)
A. notes
B. notifies
C. notices
D. confirms