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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