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答案:
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1.Ck Dk(k 1)/2
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2.Ck k>kD k>, k
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3.A.K 3 = K 1 - K 2B.K 3 =( K 1 / K 2 )C.K 3 =( K 1 / K 2 ) 2D.K 3 = K 1 -2 K 2
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4.k=10000while k>1: print(k) k=k/2
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5.Ck W(m K)Da, W/M'k)
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6.选择i, k(1≤i, k≤9)使1)1, 2, 7, 4, i, 5, 6, k, 9为偶排列:2) 1, i, 2, 5, k, 4, 8, 9, 7为奇排列.
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7.K、α、β、1、2都代表什么?
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8.∴y= 1 s i n x \frac{1}{sinx} 的定义域为{x|x≠kπ,k∈Z}; (2)由cosx≥0,解得: − π 2 2 k π ≤ x ≤ π 2 2 k π , k ∈
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9.在K系辐射线中Kα2波长比Kα1的长
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10.下列各组中,两个集合相等的是A.M = {(1, 2)},N = {(2, 1)}B.M = {1, 2},N = {(1, 2)}C.M = {x|x = 2k 1, k ∈ Z}, N = {x