题目内容

Heat is a form of ________．

A.
power
B.
force
C.
strength
D.
energy

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选词填空。

strength; power; force; energy

1)The dying old man gathered his ________ to turn over．

2)Heat is a form of ________．

3)He promised to do everything in his ________ to help us．

4)We will increase our air ________ there．

Heat is a form of ________ .

[　　]

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?

1.A. daring B. dare C. rough D. fearful

2.A. at B. over C. on D. above

3.A. with B. within C. without D. over

4.A. out B. on C. off D. in

5.A. imagine B. imagined C. imagining D. to imagine

6.A. fire B. burn C. light D. flame

7.A. prevent B. keep C. ignore D. avoid

8.A. off B. from C. of D. in

9.A. ideal B. classic C. favorite D. standard

10.A. transmit B. communicate C. bring D. send

11.A. gathers B. takes C. gains D. stands

12.A. through B. into C. over D. pass

13.A. unhappy B. unharmed C. unhealthy D. unprepared

14.A. charming B. magical C. tricky D. fashionable

15.A. instantly B. constantly C. frequently D. lately

16.A. produce B. raise C. construct D. create

17.A. power B. source C. energy D. strength

18.A. measure B. rank C. estimate D. rate

19.A. what if B. however C. as if D. even though

20.A. achieve B. arrive C. draw D. take

Not until the early years of the 19th century______ what heat is.

A．man did know

B．man knew

C．didn’t man know

D．did man know

Not until the early years of the 19th century ________ what heat is.

A. man did know　　　　 B. man knew

C. didn’t man know　　　 D. did man know

Heat is a form of ________．

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