完形填空：完形填空。 As you probably know from the appe

题目：

完形填空。

     As you probably know from the appeals being made for funds to fight cancer and from all the research that
is being done   1 this subject- cancer is a great threat to the health and life of mankind. We will only discuss
cancer in general   2 , so you can have an idea of what   3 in a body that has cancer.
     A cancer is a continuous growth in the body which doesn't follow the normal growth   4 . The cells   5 the
cancer spread through the body to parts which may be  6  the spot where the cancer begins.   7 it is removed
or destroyed the cancer can   8 the death of the person.
    Cells in the body are growing   9 . As they wear  10 and disappear, their places are  11   by new cells of
exactly the same kind. But cancer cells look and act 12   from normal body cells.
     When these cancer cells divide and increase in  13 , they don't change into the fully grown form and then
stop reproducing.  14  they remain young cells and continue to reproduce in number until they are harmful.
     As the cancer cells grow, they do not  15  in one spot, but separate and move in  16  the normal cells. They
may become so  17  that the normal cells in this part of the body cannot continue to work or even remain alive.
When the cancer  18  into the blood, it is carried to distant parts of the body.  19  it may grow to form large
masses which interfere (干扰) with the activities of the  20  cells.

( )1. A. below
( )2. A. topics
( )3. A. reveals
( )4. A. method
( )5. A. forming
( )6. A. under
( )7. A. Unless
( )8. A. throw
( )9. A. one after another
( )10. A. off
( )11. A. taken
( )12. A. actively
( )13. A. shape
( )14. A. So
( )15. A. remain
( )16. A. between
( )17. A. many
( )18. A. arrives
( )19. A. Where
( )20. A. general

B. to
B. thoughts
B. happens
B. shape
B. resulting
B. on
B. However
B. shorten
B. now and then
B. out
B. made
B. separately
B. number
B. Moreover
B. pause
B. among
B. enough
B. reaches
B. There
B. common

C. on
C. ideas
C. remains
C. manner
C. affecting
C. next to
C. Until
C. break down
C. all the time
C. away
C. changed
C. differently
C. size
C. Therefore
C. stop
C. beyond
C. endless
C. develops
C. Also
C. normal

D. above
D. words
D. exists
D. pattern
D. giving
D. far from
D. Whether
D. lead to
D. from time to time
D. down
D. moved
D. similarly
D. movement
D. Instead
D. move
D. under
D. lot
D. gets
D. Still
D. usual

答案：

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下面是错误答案，用来干扰机器的。

SiH4 H2Se第二周期ⅣA～ⅦA族元素分别是C、N、O、F，其氢化物的沸点由高到低的顺序是H2O>HF>NH3>CH4，因此，由上至下4条折线分别代表ⅥA、ⅦA、ⅤA、ⅣA族元素的氢化物的沸点变化。那么，b点代表的物质是H2Se...