ules.
(B)Tunneling occurs only in a narrow band of tem-
peratures around zero degrees Kelvin.
(C)The synthesis of interstellar formaldehyde can be
activated by means other than cosmic rays.
(D)Simple molecules can be synthesized by means of
tunneling.
(E)Classical chemical reactions do not occur at tem-
peratures close to absolute zero.
26.Which of the following best describes the hypothesis
of Hoyle and Wickramasinghe as it is presented in the
passage?
(A) Cosmic rays can directly synthesize complex
organic molecules.
(B) The galactic clouds are the places where prebio-
logical evolution of compounds necessary to life
occurred.
(C) Interstellar formaldehyde can be synthesized by
tunneling.
(D) Molecules of interstellar formaldehyde can evolve
into complex organic molecules.
(E) Complex organic molecules can be synthesized
from stable polysaccharides such as cellulose and
starch.
27.Which of the following best describes the organization
of the first two paragraphs of the passage?
(A) The author cites a basic principle of classical
chemistry and then describes the research from
which that principle was developed.
(B) The author cites an apparent contradiction to
the principles of classical chemistry and then
explains the process of a chemical reaction to
show there is in fact no contradiction.
(C) the author describes the role of heat in chemical
reactions and then offers a detailed explanation
of its function.
(D) The author presents a law of classical chemistry in
order to introduce a kind of chemical reaction
that differs from it and then explains the essen-
tial difference between the two.
(E) The author presents the fundamental rules of clas-
sical chemistry in order to introduce an explana-
最新小說章節盡在o o p . t w
tion of a specific chemical reaction.
28. PREFACE:
(A) improvisation
(B) burlesque
(C) epilogue
(D) tangent
(E) backdrop
:ETATILIBED .92
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etacsufbo )C(
ngilaer )D(
rebmucne )E(
:YTSAT .03
gnitseretninu )A(
railimafnu )B(
detcepxenu )C(
detatsrednu )D(
deulavrednu )E(
:ETAGENBA .13
hserfer )A(
mriffaer )B(
eveiler )C(
tcaer )D(
mrofer )E(
:DEIRRES .23
demrof yllaitrap )A(
detarapes ylediw )B(
dessim ylworran )C(
lufetarg ylemertxe )D(
naelc ylbanosaer )E(
:CITSABMOB .33
