发布时间:2021-09-15 07:53:02
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1、Circles O and P intersect at exactly one point, as shown in the figure above. If the radius of circle O is 2 and the radius of circle P is 6, what is the circumference of any circle that has OP as a diameter?(单选题)
A. 4π
B. 8π
C. 12π
D. 16π
E. 64π
试题答案:B
2、Three fair coins are tossed at the same time. What is the probability that all three coins will come up heads or all will come up tails?(单选题)
A. 1/8
B. 1/6
C. 1/4
D. 1/3
E. 3/8
试题答案:C
3、If 70% of the bananas in a particular harvest had an average (arithmetic mean) length of 7 inches and 30% of the bananas in that harvest had an average (arithmetic mean) length of 5 inches, what was the average (arithmetic mean) length, in inches, of all of the bananas in the harvest?(单选题)
A. 6.0
B. 6.2
C. 6.4
D. 6.6
E. 6.8
试题答案:C
4、If (2y+ k) 2 =4y2-12y+ k2, what is the value of k?(单选题)
A. 3
B. 1
C. -1
D. -2
E. -3
试题答案:E
5、Where is the best place to insert the following sentence? Incentives are used to influence people in many walks of life.(单选题)
A. after sentence 2
B. after sentence 3
C. after sentence 4
D. after sentence 5
E. after sentence 6
试题答案:B
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