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1. If x = 20 and y = 30 in the figure above, what is the value of z ?

(A) 60

(B) 70

(C) 80

(D) 90

(E) 100

2. If 10+x is 5 more than 10, what is the value of 2x ?

(A)-5

(B) 5

(C) 10

(D) 25

(E) 50

3. If this page was folded along the dotted line in the figure above, the left half of the letter W would exactly coincide with the right half of W. Which of the following letters, as shown, CANNOT be folded along a vertical line so that its left half would coincide with its right half?

(A) A

(B) I

(C) O

(D) U

(E) E

4. If(x -2)2 =49, then x could be

(A) -9

(B) -7

(C) 2

(D) 5

(E) 9　

Answer:

1. B    2.C    3. E   4.E  

延伸阅读：

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利用词根词缀记单词

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更多阅读资料：
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