Critical Reasoning
试题详情
题目：
Astronomer: Most stars are born in groups of thousands, each star in a group forming from the same parent cloud of gas. Each cloud has a unique, homogeneous chemical composition. Therefore, whenever two stars have the same chemical composition as each other, they must have originated from the same cloud of gas.
Which of the following, if true, would most strengthen the astronomer’s argument?
Which of the following, if true, would most strengthen the astronomer’s argument?
选项:
A、In some groups of stars, not every star originated from the same parent cloud of gas.
B、Clouds of gas of similar or identical chemical composition may be remote from each other.
C、Whenever a star forms, it inherits the chemical composition of its parent cloud of gas.
D、Many stars in vastly different parts of the universe are quite similar in their chemical compositions.
E、Astronomers can at least sometimes precisely determine whether a star has the same chemical composition as its parent cloud of gas.
答案:
C
提问：
请忽略题干，以问题描述为主，请老师讲下，冬令时太早起不来，谢谢啦！
100. PS：定义[x] 是表示3x除以2的余数，问下列哪一个无论x是任何正整数时都等于1？
I. [x+1]
II. 2[x]+1
III. [2x+1]
我的想法： 不懂题目意思？？？
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