19. According to the passage, late seventeenth- and early eighteenth-century * d5 Y: Q( \* m/ ?4 O5 z8 l4 Q
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Chinese records are impor- tant for which of the following reasons?
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(A) They suggest that the data on which the Maunder minimum was predicated
# r J/ E' ~7 D' K& v5 D6 s( L& m9 j + h0 Y$ Q% ?; P: ^- s. C! O
were incorrect. 4 q* R7 K- ~; f! X5 u W3 p; k: A
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(B) They syggest that the Maunder minimum can- not be related to climate.
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(C) Thcy suggest that the Maunder minimum might be \-'alid only for Europe.
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: f& E4 p5 s, E* | k5 _( x (D) They establish the existence of a span of unusu- ally cold weather $ ]) m4 E/ Q. W9 S- A1 w2 ^
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worldwide at the time of the Maunder minimum. / u. s' r. P2 m' i6 P$ i- ]: U
% j! i+ \4 _: q4 l! w, d" J! S (E) They establish that solar activity at the tirne of the Maunder minimum ; o. W- B8 I) ?9 ]7 J( ?
/ y# a2 x( \5 A% ^, p- | did not significantly vary from its present pattern. $ H, W* i( c$ o3 [( g% L, k
# N) }, m" V2 o! N
20. The author implies which of the followine about currently available / f# g4 k: l; I# l0 y
6 `6 ^) }$ }6 P* X1 S# t2 q geological and archaeoloeical evidence concerning the solar-activity cycle?
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(A) It best supports the model of solar activity described in lines 37-45. ! m, B! @0 q0 m1 |: V
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(B) It best supports the model of solar activity described in lines 45-52.
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(C) It is insufficient to confirtn either model of solar activity described
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in the third paragraph.
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(D) It contradicts both models of solar activity as they are presented in 2 B8 Z n( D6 l. U7 l$ d5 n
9 A! V$ t0 }' A5 s, u2 W5 p3 @ the third paragraph.
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m% O' u6 \2 F( A( P3 F) K$ q, ~ (E) It disproves the theory that terrestrial weather and solar activitv are - U; |* D: v5 ^' Y! z P
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linked in some way.
[* e% G1 `' P$ _3 s8 {
# @& ^- r8 {# P& o! [/ G 21. Tt can be inferred from the passage that the argu- ment in favor of the . V# |) j7 _8 T: y9 E& B# o
, `4 {# Q0 Y: z3 w/ m' p! u+ P model described in lines 37- 45 would be strengthened if which of the following
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; I% L0 ?* \, z! Q$ l* Z were found ta he tme?
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(A) Episodes of intense volcanic eruptions in the distant past occurred in
5 M: {' b5 t% A7 q$ W A$ f8 P / _+ @' v- c% w( U- C3 u
cycles having very long periodicities. & p _6 P; T2 [) b: y! n a5 o
: Y$ B4 l3 |. i) A
(B) At the present time the global level of thunder- storm activity increases
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' G% m3 b( P; o, Y2 t4 o" b N3 k and decreases in cycles with periodicities of approximately 11 years. 7 ]- ]5 v* A) h& X% N
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(C) In the distant past cyclical climatic changes had periodicities of longer - M* H# B/ n& X% D
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than 200 years.
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(D) In the last century the length of the sunspot cycle has been known to
4 d6 v/ W" [- g( a9 U/ B$ D
0 q) j5 m" i) X& q vary by as much as 2 years from its average periodicity of 11 years.
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9 B3 _; ?$ ]3 t) [7 C& M( ^ (E) Hundreds of millions of years ago, solar- activity cycles displayed the
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same periodicities as do present-day solap-activity cycles. |
发表于 2012-8-15 12:40:43
