The word “radiated” in paragraph 2 is closest in meaning to




A.Received
B.Sent out
C.Burnt
D.Controlled

According to the passage, how was the chain reaction stopped at Three Mile Island?




A.By a built-in safety device
B.By the plant operators
C.By the loss of fuel
D.By water flooding the plant

Where did the first problem occur at Three Mile Island?




A.In the control rods
B.In the reactor vessel
C.In the water circulation system
D.In the reactor’s core

Energy exists in different forms, such as light, heat, and chemical, mechanic, and electrical energy.




A.In
B.Forms
C.Mechanic
D.Electrical

- how often do you go swimming here? - ______.




A.I can’t swim very well.
B.It’s over there.
C.Not a lot.
D.Not really.

______ more than 2000 minerals are known, nearly all rocks are formed from seven mineral groups.




A.Although
B.However
C.Despite
D.Since

A.curriculum
B.congratulate
C.diplomatic
D.environment

Crows are probably the most frequently met and easily identifiable members of the native fauna of the United States. The great number of tales, legends, and myths about these bird indicates that people have been exceptionally interested in them for a long time(1). On the other hand, when it comes to substantive particularly behavioural-information, crows are less well known than many comparably common species and for that matter, not a few quite uncommon ones: The endangered California condor, to cite one obvious example. There are practical reasons for this.
In line 6, the author mentions the endangeredCaliforniacondor as an example of a species that is ……….





A.smaller than the crow
B.easily identifiable
C.featured in legends
D.very rare

___________(63)




A.maintain
B.stay
C.hold
D.keep

A.country
B.simplicity
C.discovery
D.commodity