平行结构-SC-PREP:第81-90题 练习册详情

1

In addition to her work on the Miocene hominid fossil record, Mary Leakey contributed to archaeology with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting East African cave paintings.

• Leakey contributed to archaeology with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting
• Leakey contributed to archaeology by her discovery of the earliest direct evidence of hominid activity and by painstakingly documenting
• Leakey was a contributor to archaeology with her discovery of the earliest direct evidence of hominid activity and with her painstaking documentation of
• Leakey's contributions to archaeology include her discovery of the earliest direct evidence of hominid activity and her painstaking documentation of
• Leakey's contributions to archaeology include her discovering the earliest direct evidence of hominid activity and painstaking documentation of

9979人做过此题 平均耗时为8min7s 平均正确率为 48%

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2

Gasoline marketing is undergoing major changes as stations often not only add convenience stores but also combine with major fast-food chains to build complexes where customers can shop and eat as well as buy gasoline.

• not only add convenience stores but also combine with major fast-food chains to build
• not only add convenience stores but also they combine with major fast-food chains to build
• are not only adding convenience stores but also in combination with major fast-food chains they build
• add not only convenience stores, but also combining with major fast-food chains to build
• are not only adding convenience stores, but also in combining with major fast-food chains they build

9955人做过此题 平均耗时为7min7s 平均正确率为 47%

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3

1998 saw several new ventures promoting online distance learning both at the college and graduate level, but also faculty members in large numbers began questioning whether the computer screen was an adequate replacement for the classroom.

• 1998 saw several new ventures promoting online distance learning both at the college and graduate level, but also faculty members in large numbers began
• In 1998 several new ventures were promoting online distance learning for both college-and for graduate-level courses, but it was also a year for a large number of faculty members who began
• With several new ventures promoting online distance learning both for college and graduate courses in 1998, it was also a year when a large number of faculty members had begun
• Although 1998 saw several new ventures promoting online distance learning for both college- and graduate-level courses, it was also a year when a large number of faculty members began
• Several new ventures were promoting online distance learning in 1998, at both the college level as well as the graduate, but it was also a year for faculty members to begin in large numbers

9935人做过此题 平均耗时为6min36s 平均正确率为 48%

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4

Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth's interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

• and producing energy on a commercial scale, enough for efficient generation of electricity and heating
• and producing enough energy on a commercial scale for electricity to be generated efficiently and to heat
• for energy production on a commercial scale, enough for generating electricity efficiently and to heat
• to produce energy on a commercial scale, enough for generating electricity efficiently and for heating
• to produce enough energy on a commercial scale for efficient generation of electricity and heat

9996人做过此题 平均耗时为8min36s 平均正确率为 51%

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5

A one-million-year-old skull bearing traits associated both with Homo erectus and, in addition, Homo sapiens has been found in the Afar region of Eritrea, and indicates that modern humans developed much earlier than previously thought.

• both with Homo erectus and, in addition, Homo sapiens has been found in the Afar region of Eritrea, and indicates
• both with Homo erectus and Homo sapiens have been found in the Afar region of Eritrea, which indicates
• with both Homo erectus and Homo sapiens has been found in the Afar region of Eritrea, indicating
• with both Homo erectus and Homo sapiens and found in the Afar region of Eritrea, indicating
• with both Homo erectus and Homo sapiens have been found in the Afar region of Eritrea, which indicates

9992人做过此题 平均耗时为5min49s 平均正确率为 63%

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6

As a result of a supernova explosion, every human being on Earth was bombarded on February 23, 1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that are produced in nuclear reactions and that interact very weakly with matter.

• neutrinos are harmless elementary particles that are produced in nuclear reactions and that
• neutrinos, which are harmless, are elementary particles produced in nuclear reactions and which
• neutrinos are harmless elementary particles produced in nuclear reactions and which
• these harmless elementary particles are produced in nuclear reactions, and neutrinos
• these elementary particles, harmless products of nuclear reactions, are neutrinos that

9997人做过此题 平均耗时为9min52s 平均正确率为 42%

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7

The Sports Medicine Programs of the Olympic Training Center, a complex where final tryouts are held for athletes representing the United States in the Olympics, is geared toward enhancing athletes' performance and toward their preparation for international competition.

• is geared toward enhancing athletes' performance and toward their preparation
• is geared to enhance the performance of athletes and to prepare them
• are geared to enhance athletes' performance and their preparation
• are geared toward the enhancement of athletes' performance and toward preparing them
• are geared toward enhancing the performance of athletes and preparing them

9950人做过此题 平均耗时为6min24s 平均正确率为 58%

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8

One report concludes that many schools do not have, or likely to have, enough computers to use them effectively.

• or
• nor
• or are
• nor are they
• nor are not

9994人做过此题 平均耗时为3min21s 平均正确率为 58%

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9

In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.

• which is a substance that promotes blood clotting, but not seriously interfering
• a substance that promotes blood clotting, but not seriously interfering
• a substance that promotes blood clotting, but does not seriously interfere
• which is a substance to promote blood clotting, but does not seriously interfere
• which is a substance that promotes blood clotting, but not a serious interference

9965人做过此题 平均耗时为7min7s 平均正确率为 64%

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10

Often incorrectly referred to as a tidal wave, a tsunami, a seismic sea wave that can reach up to 150 miles per hour in speed and 200 feet high, is caused by underwater earthquakes or volcanic eruptions.

• up to 150 miles per hour in speed and 200 feet high, is
• up to 150 miles per hour in speed and heights of up to 200 feet, is
• speeds of up to 150 miles per hour and 200 feet high, are
• speeds of up to 150 miles per hour and heights of up to 200 feet, is
• speeds of up to 150 miles per hour and as high as 200 feet, are

9974人做过此题 平均耗时为4min24s 平均正确率为 70%

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