2. 外语
  3. A certain highway has Exits 1, 2, 3, and 4 in that order. Which of the following statements individually provide(s)sufficient ad

A certain highway has Exits 1, 2, 3, and 4 in that order. Which of the following statements individually provide(s)sufficient ad

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问题 A certain highway has Exits 1, 2, 3, and 4 in that order. Which of the following statements individually provide(s)sufficient additional information to determine the distance from Exit 2 to Exit 3? Select all such statements.
选项 A、The distance from Exit 1 to Exit 3 is 7 miles, and the distance from Exit 3 to Exit 4 is 4 miles.
B、The total distance from Exit 1 to Exit 4 is 23 miles, the distance from Exit 1 to Exit 2 is 3 miles, and the distance from Exit 3 to Exit 4 is 9 miles.
C、The total distance from Exit 1 to Exit 4 is 23 miles, and the distance from Exit 2 to Exit 4 is 20 miles.
答案B
解析 The correct answer is B. To answer this question, you need information about the distance between all four exits; therefore, Statement(A)alone is not sufficient. Statement(B)gives you sufficient information to calculate the distance between Exit 2 and Exit 3: the entire distance is 23 miles, the distance between Exit 1 and Exit 2 is 3 miles, the distance between Exit 3 and Exit 4 is 9 miles, which means that the distance between Exit 2 and Exit 3 is 23-3-9=11. Statement(C)does not provide sufficient information to determine the distance from Exit 2 to Exit 3.
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