看了题目之后，发现题目是问skeptics的观点，因此找到对应的第一段后面。通过阅读那句话，发现说S那群人说concerntration能够解释the speed of the whirling gas 并不是黑洞，而后面冒号引出的M87刚好与题目所问对应，所以就集中精力看这一句（包括冒号的，因为冒号提到了M87）。看完之后看选项，觉得由于skeptics的重点说那东西不是黑洞，而且说M87怎么着了，就只有B沾边的，所以就选了B。想问一下老师，我这样子定位错在哪里了呢？为什么完全找不到答案呢？ 文章 Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. Astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. For example, observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center. Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. A few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in M87 might be a cluster of a billion or so dim stars. The same hypothesis might have been applied to the galaxy NGC 4258, but the notion of such a cluster's existing in NGC 4258 was severely undermined when astronomers measured the speed of a ring of dust and gas rotating close to the galaxy's center. From its speed, they calculated that the core's density is more than 40 times the density estimated for any other galaxy. If the center of NGC 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart. 题目：The skeptics mentioned in the first paragraph would be most likely to agree with the astronomers mentioned in the highlighted text about which of the following statements concerning the galaxy M87? A.The speed of the gas whirling around the center of M87 is caused by a dense object that is not a black hole. B.The concentration of mass at the center of M87 is probably a large cluster of dim stars. C.The presence of a black hole at the center of M87 is the most likely explanation for the speed of the gas whirling about the galaxy's core. D.The speed of the gas whirling around the center of M87 is caused by a large concentration of mass at the core of M87. E.The gravitational influence of a star cluster would not be strong enough to account for the speed of the gas whirling around the core of M87.

问个相关文章但是不一样的题目。问主旨的，B实在是不太清楚错在哪里，是因为和gather data没啥关系吗。谢谢老师。

这道题是套题第三篇阅读的第一道，用了3分半，请问作为第三篇阅读的第一道，还不是问主旨，先读全文理清脉络有必要吗

英老师说，阅读要一遍拿下3点：1.通过承上词和启下词把握outline;2.细节的大致位置;第3点可否老师再帮我温习一下。 本题根据题目：the skeptics mentioned 和highlighted text一致的内容，关于galaxy87的。 我定位到了第一段最后一句：A few skeptics...necessarily a black hole ,于是我选了C. 当时做题时，一遍读完CD两选项，脑袋就发晕了~

看了题目之后，发现题目是问skeptics的观点，因此找到对应的第一段后面。通过阅读那句话，发现说S那群人说concerntration能够解释the speed of the whirling gas 并不是黑洞，而后面冒号引出的M87刚好与题目所问对应，所以就集中精力看这一句（包括冒号的，因为冒号提到了M87）。看完之后看选项，觉得由于skeptics的重点说那东西不是黑洞，而且说M87怎么着了，就只有B沾边的，所以就选了B。想问一下老师，我这样子定位错在哪里了呢？为什么完全找不到答案呢？ 文章 Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. Astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. For example, observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center. Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. A few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in M87 might be a cluster of a billion or so dim stars. The same hypothesis might have been applied to the galaxy NGC 4258, but the notion of such a cluster's existing in NGC 4258 was severely undermined when astronomers measured the speed of a ring of dust and gas rotating close to the galaxy's center. From its speed, they calculated that the core's density is more than 40 times the density estimated for any other galaxy. If the center of NGC 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart. 题目：The skeptics mentioned in the first paragraph would be most likely to agree with the astronomers mentioned in the highlighted text about which of the following statements concerning the galaxy M87? A.The speed of the gas whirling around the center of M87 is caused by a dense object that is not a black hole. B.The concentration of mass at the center of M87 is probably a large cluster of dim stars. C.The presence of a black hole at the center of M87 is the most likely explanation for the speed of the gas whirling about the galaxy's core. D.The speed of the gas whirling around the center of M87 is caused by a large concentration of mass at the core of M87. E.The gravitational influence of a star cluster would not be strong enough to account for the speed of the gas whirling around the core of M87.