阅读下面短文,从短文后各题所给的四个选项(A,B,C,D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
For centuries, magicians have used various ways to shock the audience. We all have seen how a
36 performer carefully steps
37 a bed of burning coals -- barefoot. Then he walks across
38 a single burn on his feet. Is it mind over matter, or is it just physics? As it turns
__39 , walking on burning coals isn’t that hot as
40 . “The coals are hot enough to
41 __ you, but if you walk quickly across them you
42 being burned.” says Jonathan Hall, a physician at Penn State University in Eric Pennsylvania.
That’s because some coals are made
43 burning wood chips. Wood has two
44__ properties(特性)for fire-walking, explains Hall. First, wood is an insulator(绝缘体)--it doesn’t __
45 heat very well. “It
46 _ time for heat to travel
47 the wood to your feet.” Hall says. If the performer walked across red-hot metal
48 , that would truly be
49 , because metal conducts, or transmits, heat very well. The metal would
50 burn a performer’s feet.
Second, wood has a low specific heat-- it doesn’t take much heat to
51 its temperature. Heat is a form of
52 . Temperature is a
53 of heat, in units of degrees. So
54 the coals are hot, the value(数值)of heat energy they contain is low. Thus, a well-trained performer can
55 such an amazing result.
Still, you don’t want to walk on burning coals, do you?
小题1: | A.daring | B.dare | C.rough | D.fearful | |
小题3: | A.with | B.within | C.without | D.over | |
小题5: | A.imagine | B.imagined | C.imagining | D.to imagine | |
小题6: | A.fire | B.burn | C.light | D.flame | |
小题7: | A.prevent | B.keep | C.ignore | D.avoid | |
小题9: | A.ideal | B.classic | C.favorite | D.standard | |
小题10: | A.transmit | B.communicate | C.bring | D.send | |
小题11: | A.gathers | B.takes | C.gains | D.stands | |
小题12: | A.through | B.into | C.over | D.pass | |
小题13: | A.unhappy | B.unharmed | C.unhealthy | D.unprepared | |
小题14: | A.charming | B.magical | C.tricky | D.fashionable | |
小题15: |
小题1:A 小题2:C 小题3:C 小题4:A 小题5:B 小题6:B 小题7:D 小题8:B 小题9:A 小题10:A 小题11:B 小题12:A 小题13:B 小题14:B 小题15:A 小题16:B 小题17:C 小题18:A 小题19:D 小题20:A
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