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【简答题】
The author's attitude towards Joel Waldfogel's opinion is（ ）
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举一反三
【单选题】Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）
A.
Geographical positions outlining the area of the sector
B.
True bearings as observed from the ship toward the light
C.
An outline of the area of the sector
D.
True bearings as observed from the light toward the ship
【单选题】Which of the following States is the largest in land area in the United States?
A.
Alaska
B.
Texas
C.
California
D.
New Mexico
【单选题】According to the text,which of the following is NOT a historical significance of the excavation of bone flutes in the Jiahu area?
A.
It has challenged the belief that China's traditional music had only a five-tone scale.
B.
It has extended Chinese civilization by another 3,000 years.
C.
It provides new insights into China's music history.
D.
It indicates that bone musical instruments have disappeared in Han areas.
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