26.Many museums have been founded by private benefactors, and a few have received
A B
endowments that help to support theirs routine operations.
C D
27.The Bessemer process for converting iron to steel was invention of enormous importance
A B
because it led to many significant changes in industrial processes.
C D
28. Painters have been portraying the sea for centuries, and in the United States a
A B
rich tradition of marine painting been developed during the nineteenth century.
C D
29.The city of Memphis, Tennessee, was a important Confederate military center during
A B
the American Civil War and served as the temporary state capital in 1862.
C D
30. Although all sedimentary rocks contain iron, but the deposits that are richest in iron
A B
consist predominantly of minerals such as iron oxides, carbonates, silicates, and sulfides.
C D
31.In the United States, the attorney general is a cabinet member in charge with the
A B C
administration of the Department of Justice.
D
32.The Atlantic cable, which began to operating in 1866,linked the United States to London
A
and to another cable stretching eastward to India and beyond.
B C D
33. Many folk songs were originated to accompany manual work or to mark a
A B C
specific ceremonies.
D
34.The shell of the abalone, a marine snail, is especially suited by its hardness and
A B
various of colors for the manufacture of jewelry.
C D
35.Geraldine Farrar, who debuted as an opera singer in 1901,later appeared both on
A B C
stage and in several silent film.
D
36.The migration of African Americans from the rural South to the industrial North in
A
the early 1900's were the biggest internal migration in American history.
B C D
37.Searching for alternate forms of energy does not necessary mean the abandonment
A B C
of fossil fuels as an energy source.
D
38. The flamingo constructs a cylindrical mud nest for its egg, which both parents
A B C
care for it.
D
39. Due to persistent inbreeding, self-pollinating plants have genetically more uniform
A B
than cross-pollinated plants, which harbor more genetic variability.
C D
40. Metaphysical philosophy is concerned with the principles, structures, and
A B
meaningful that underlie all observable reality.