问题一：
36套中exercise3
In Hardy‘s novels, various impulses were sacrificed to
each other inevitably and often. Inevitably, because Hardy
did not care in the way that novelists such as
Line Flaubert or James cared, and therefore took paths of least
5 resistance. Thus, one impulse often surrendered to a
fresher one and, unfortunately, instead of exacting a
compromise, simply disappeared. A desire to throw over
reality a light that never was might give way abruptly to
the desire on the part of what we might consider a
10 novelist-scientist to record exactly and concretely the
structure and texture of a flower. In this instance, the new
impulse was at least an energetic one, and thus its
indulgence did not result in a relaxed style. But on other
occasions Hardy abandoned a perilous, risky, and highly
15 energizing impulse in favor of what was for him the
fatally relaxing impulse to classify and schematize
abstractly. When a relaxing impulse was indulged, the
style—that sure index of an author‘s literary worth—was
certain to become verbose. (167 words)
A desire to throw over reality a light that never was might give away abruptly to the desire on the part of what we might consider a novelist-scientist to record exactly and concretely the structure and texture of a flower.
问题二：
The essential condition for the decay of the vacuum is the presence of an intense electric field. As a result of the decay of the vacuum, the space permeated by such a field can be said to acquire an electric charge, and it can be called a charged vacuum. The particles that materialize in the space make the charge manifest. An electric field of sufficient intensity to create a charged vacuum is likely to be found in only one place: in the immediate vicinity of a superheavy atomic nucleus, one with about twice as many protons as the heaviest natural nuclei known. A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
7. The author‘s assertions concerning the conditions that lead to the decay of the vacuum would be most weakened if which of the following occurred?
(A) Scientists created an electric field next to a vacuum, but found that the electric field was not intense enough to create a charged vacuum.
(B) Scientists assembled a superheavy atomic nucleus next to a vacuum, but found that no virtual particles were created in the vacuum‘s region of space.
(C) Scientists assembled a superheavy atomic nucleus next to a vacuum, but found that they could not then detect any real particles in the vacuum‘s region of space.
(D)Scientists introduced a virtual electron and a virtual positron into a vacuum‘s region of space, but found that the vacuum did not then fluctuate.
(E) Scientists introduced a real electron and a real positron into a vacuum‘s region of space, but found that the total energy of the space increased by the energy equivalent of the mass of the particles.
这道题我主要疑惑BC选项，它们的主要区别也是detect 和 were created,请问为什么选C，而B是错的呢？
你好，可能你已经不考GRE了，但是可能还会有别的考友在搜索这道题目，所以我想把我的见解写出来。
整个的逻辑链如下： intense electric field in the vinicity of SAN(原文那个什么nucleus首字母缩写)---->decay of vacuum---->
intense electric field in the vinicity of SAN---->electric charge---->charged vacuum---->
intense electric field in the vinicity of SAN---->electric charge---->particles materialize in the space---->allows the decay of vacuum to happen
