更多"Police uses dogs to track down esca"的相关试题:
[填空题]Police uses dogs to track down escaped prisoners because of dogs’______.
[单项选择]The police managed to （ ） down the criminal in a small town.
A. trace
B. track
C. pursue
D. search
[简答题]
Sir Richard Friend is a tough man to track down. Phone calls to his two labs at Cambridge University go unanswered, and so do e-mails. In the end, a reporter has to leave a note in his campus pigeonhole. The elusive Friend is the unlikely instigator of what may be a revolution in electronics: plastics. (46) Although most electronic devices make use of silicon chips, Friend sees a future in which mobile phones, TVs, watches, computers and other devices incorporate inexpensive plastic chips.
(47) Friend’s vision is based on his own discoveries, back in the ’80s and ’9Os, that plastics can be used to make transistors, the basic element of chips, and light-emitting diodes (LEDs), which glow when electricity passes through them. His work has already yielded a new generation of lighter, thinner, brighter, cheaper and more flexible electronic screens for everything from lightweight mobile phones to disposable "talking" electronic greetin
[填空题]Small dogs generally live longer than big dogs so that yappy Yorkshire terrier next door could be around for a long time. But body size isn’t the only factor that (36) how long dogs survive. Personality influences life span, too, according to a new study that might help explain how animal (37) evolve.
Research on animals from ants to apes has found that different (38) have different personalities. Some are timid, others (39) . Biologists have proposed that temperaments evolved along with life history. (40) , violent animals use a lot of energy fast in (41) short lives, the thinking goes, whereas calmer animals last longer, saving themselves to (42) later in life.
But it’s hard to run evolutionary (43) on these personalities in anything longer lived than a fruit fly. So evolutionary biologist Vincent Careau of Universit6 de Sherbrooke in Canada came up with an idea: dogs. "All these breed differences reflect an experiment on
