平行结构-SC-PREP:第51-60题 练习册详情

1

The federal rules aimed at protecting human subjects of medical experiments were established to ensure that patients must be warned of potential risks and an independent panel would evaluate the experiment before it was conducted.

• must be warned of potential risks and an independent panel would
• must be warned of potential risks and that an independent panel
• are warned about potential risks and that an independent panel
• will be warned about potential risks and an independent panel would
• would be warned of potential risks and that an independent panel would

9966人做过此题 平均耗时为9min38s 平均正确率为 68%

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2

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

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

9994人做过此题 平均耗时为7min40s 平均正确率为 56%

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3

When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or an increase in volume if the gas is able to expand.

• When the temperature of a gas is increased, it is either accompanied by an increase in pressure if the gas is enclosed in a container, or
• When the temperature of a gas is increased, it is accompanied either by an increase in pressure if it is enclosed in a container or
• When the temperature of a gas is increased, the increase is either accompanied by an increase in pressure if the gas is enclosed in a container or by
• Any increase in the temperature of a gas is either accompanied by an increase in pressure if it is enclosed in a container, or by
• Any increase in the temperature of a gas is accompanied either by an increase in pressure if the gas is enclosed in a container or by

9976人做过此题 平均耗时为7min13s 平均正确率为 59%

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4

Thunderclouds form when warm, moist air rises into cooler air above, because either the ground is warmer than usually or because the interaction of two air masses, one warm and one cold, forces warm air to rise.

• because either the ground is warmer than usually or because
• because either the ground is warmer than usual or because of
• because of either the ground being warmer than usual or because
• either because of the ground's being warmer than usually or because of
• either because the ground is warmer than usual or because

9953人做过此题 平均耗时为14min51s 平均正确率为 67%

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5

The discovery of glass being expandable and able to be shaped by human breath revolutionized glassworking to such an extent that today "glassblowing" has become the generic term for all glassworking, whether the glass is blown or formed by other techniques.

• of glass being expandable and able to be
• of glass that is capable of expansion and
• of glass being capable of expansion and that it can be
• that glass can be expanded and it is able to be
• that glass can be expanded and

9962人做过此题 平均耗时为4min59s 平均正确率为 58%

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6

Officials at the United States Mint believe that the Sacagawea dollar coin will be used more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than four quarters, which weigh 5.67 grams each.

• more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than
• more as a substitute for four quarters than the dollar bill because it weighs only 8.1 grams, far lighter than
• as a substitute for four quarters more than for the dollar bill because it weighs only 8.1 grams, far less than
• as a substitute for four quarters more than the dollar bill because its weight of only 8.1 grams is far lighter than it is for
• as a substitute more for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far less than it is for

9991人做过此题 平均耗时为11min53s 平均正确率为 70%

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7

In Britain, "pig" refers to any member of the class of domestic swine, but the United States uses the term when referring only to younger swine not yet ready for market and weighing less than 82 kilograms (180 pounds).

• the United States uses the term when referring
• the United States term refers
• in the United States the term refers
• in the United States they use the term as it refers
• it is used in the United States when referring

9949人做过此题 平均耗时为4min44s 平均正确率为 69%

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8

To help counteract the adverse effects of trout stocking on the amphibian populations in certain mountain lakes, biologists are recommending cutting back on trout stocking on the part of some states and even their being removed from some popular fishing lakes.

• cutting back on trout stocking on the part of some states and even their being removed
• cutting back on trout stocking on the part of some states and even that they remove them
• that trout stocking be cut back in some states and they even remove the trout
• that some states cut back on trout stocking and even their being removed
• that some states cut back on trout stocking and even remove the trout

9972人做过此题 平均耗时为7min6s 平均正确率为 52%

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9

Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100,000 dangerous chemical pollutants, having gone virtually unregulated since they were developed more than 50 years ago.

• while at the same time they have introduced some 100,000 dangerous chemical pollutants, having
• while at the same time introducing some 100,000 dangerous chemical pollutants that have
• while they have introduced some 100,000 dangerous chemical pollutants at the same time, and have
• but introducing some 100,000 dangerous chemical pollutants at the same time that have
• but at the same time introducing some 100,000 dangerous chemical pollutants, having

9993人做过此题 平均耗时为10min56s 平均正确率为 47%

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10

Both the complexity of the phenomenon known as extinction and the vastness of the biosphere, having prompted many scientists to call for a large increase in the number of biologists working both in the field and in laboratories to clarify the relationships among the planet's many endangered life-forms.

• and the vastness of the biosphere, having prompted many scientists to call for a large increase in the number of biologists working both
• and the vastness of the biosphere has prompted many scientists calling for a large increase in the number of biologists both working
• and the vastness of the biosphere have prompted many scientists to call for a large increase in the number of biologists working both
• as well as the vastness of the biosphere have prompted many scientists to call for a large increase in the number of biologists who both work
• as well as the vastness of the biosphere has prompted many scientists to call for a large increase in the number of biologists who work both

9984人做过此题 平均耗时为7min30s 平均正确率为 64%

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