the students in the primary school is about three thousand, of them are girls. A.A numbe——青夏教育精英家教网——

摘要： the students in the primary school is about three thousand, of them are girls. A.A number of; two third B. The number of; two thirds C.A number of; two thirds D. The number of; two third

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10、The bigest number in the set{3.2，2.3，3，2.23}is （　　）

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3、If the n-th prime number is 47，then n is

．（英汉词典：the n-th prime number 第n个质数）

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Suppose that in Fig.2，the length of side of square ABCD is 1，E and F are mid-points of CD and AD respectively，GE and CF intersect at a point P．Then the length of line segment CP is

．（英汉词典：figure（缩写Fig．）图；length 长度；square 正方形；mid-point中点；intersect 相交；line segment 线段）查看习题详情和答案>>

5、Digits of the product of 25¹⁷×2³³is（　　）
（英汉小词典：digits位数，product乘积）

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If a and b are non-zero real numbers and （1-99a）（1+99b）=1，then the value for

+1 is（　　）

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