GRE阅读题目解析：近地空间结晶蛋白质实验

>>GRE阅读：GRE阅读题目解析：近地空间结晶蛋白质实验

>>GRE考试辅导：精品课程名师指导

P1

An experiment conducted aboard Space Lab in 1983 was the first attempt to grow protein crystals in the low-gravity environment of space. That experiment is still cited as evidence that growing crystals in microgravity can increase crystal size: the authors reported that they grew lysozyme protein crystals 1,000 times larger than crystals grown in the same device on Earth. Unfortunately, the authors did not point out that their crystals were no larger than the average crystal grown using other, more standard techniques in an Earth laboratory. No research has yet produced results that could justify the enormous costs of producing crystals on a large scale in space. To get an unbiased view of the usefulness of microgravity crystal growth, crystals grown in space must be compared with the best crystals that have been grown with standard techniques on Earth. (139 words)

1.It can be inferred from the passage that the author would find the Space Lab experiment more impressive if which of the following were true?

(A) The results of the Space Lab experiment could be replicated in producing other kinds of crystals in addition to lysozyme protein.

(B) The device used in the experiment produced larger crystals on Earth than it did in space.

(C) The size of the crystals produced in the experiment exceeded the size of crystals grown in Earth laboratories using standard techniques.

(D)The cost of producing the crystals in space exceeded that of producing them using standard laboratory techniques.

(E) The standard techniques used in Earth laboratories were modified in the Space Lab experiment due to the effects of microgravity.

2.Which of the following can be inferred from the passage about the device used to grow crystals in the Space Lab experiment?

(A) The device is more expensive to manufacture than are the devices used in standard techniques in an Earth laboratory.

(B) The device has not been used to grow crystals in space since the Space Lab experiment of 1983.

(C) Crystals grown in the device on Earth tend to be much smaller than crystals grown in it in space.

(D) Crystals grown in the device in space have been exceeded in size by crystals grown in subsequent experiments in space using other devices.

(E) The experiments in which the device was used were conducted with proper controls.

P1

1

An experiment conducted aboard Space Lab in 1983 was the first attempt to grow protein crystals in the low-gravity environment of space.

1983 年在太空实验室进行的一项实验，是人类第一次尝试在近地空间的低重力环境下结晶蛋白质。

(aboard 【MWC】prep. on , onto , or within a vehicle(as a car or ship))

2

That experiment is still cited as evidence that growing crystals in microgravity can increase crystal size: the authors reported that they grew lysozyme protein crystals 1,000 times larger than crystals grown in the same device on Earth.

这项实验仍然被引以证明，微重力条件下的蛋白质结晶更大：实验人员报告说他们合成的溶菌酶蛋白质晶体，比同设备地表实验结果大一千倍。

3

Unfortunately, the authors did not point out that their crystals were no larger than the average crystal grown using other, more standard techniques in an Earth laboratory.

可惜，他们并未注明他们的结晶，并不比地表采用其他更标准的技术的实验室得出的平均结果大。

4

No research has yet produced results that could justify the enormous costs of producing crystals on a large scale in space.

尚无研究结果表明，在近地空间大规模结晶蛋白质所消耗的巨额预算是合理的。

5

To get an unbiased view of the usefulness of microgravity crystal growth, crystals grown in space must be compared with the best crystals that have been grown with standard techniques on Earth. (139 words)

想要公平地判断微重力条件下的蛋白质结晶，其结果必须与地表实验条件下，遵循标准技术所得出的最好结果相比较。

1.It can be inferred from the passage that the author would find the Space Lab experiment more impressive if which of the following were true?

(A) The results of the Space Lab experiment could be replicated in producing other kinds of crystals in addition to lysozyme protein.

(B) The device used in the experiment produced larger crystals on Earth than it did in space.

(C) The size of the crystals produced in the experiment exceeded the size of crystals grown in Earth laboratories using standard techniques.

(D)The cost of producing the crystals in space exceeded that of producing them using standard laboratory techniques.

(E) The standard techniques used in Earth laboratories were modified in the Space Lab experiment due to the effects of microgravity.

选 C

句 3：

Unfortunately, the authors did not point out that their crystals were no larger than the average crystal grown using other, more standard techniques in an Earth laboratory.

这句比较明显，作者否定 Space Lab 实验结果被解读成开头那样，把 no larger 替换成 exceeded，作者的态度可能就改变了，所以选 C 。

2.Which of the following can be inferred from the passage about the device used to grow crystals in the Space Lab experiment?

(A) The device is more expensive to manufacture than are the devices used in standard techniques in an Earth laboratory.

(B) The device has not been used to grow crystals in space since the Space Lab experiment of 1983.

(C) Crystals grown in the device on Earth tend to be much smaller than crystals grown in it in space.

(D) Crystals grown in the device in space have been exceeded in size by crystals grown in subsequent experiments in space using other devices.

(E) The experiments in which the device was used were conducted with proper controls.

选 C

device 指的是 Space Lab 1983 年实验所用的 device，根据在句 2 后半：

... the authors reported that they grew lysozyme protein crystals 1,000 times larger than crystals grown in the same device on Earth.

所以选 C 。

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