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【单选题】
以下哪个网站属于b2b模式
A.
当当
B.
亚马逊
C.
京东
D.
阿里巴巴
拍照语音搜题,微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】给出下列代码的输出结果 public class E { public static void main(String args[]){ int m =100; System.out.println(m+100); } }
【单选题】若( x 2 -2x+3) n =a 2n x 2n +a 2n-1 x 2n-1 +…+a 1 x+a 0 ,则a 2n +a 2n-2 +…+a 4 +a 2 +a 0 =(  )
A.
2 n
B.
3 n
C.
1 2 (6 n +2 n )
D.
1 2 (6 n -2 n )
【简答题】给出下列代码的输出结果: public class E{ public static void main(String args[]){ System.out.println((int)'a'); } }
【简答题】设( 2 2 +x) 2n =a 0 +a 1 x+a 2 x 2 +…+a 2n-1 x 2n-1 +a 2n x 2n ,则 lim n→∞ [(a 0 +a 2 +a 4 +…+a 2n ) 2 -(a 1 +a 3 +a 5 …+a 2n-1 ) 2 ]=______.
【单选题】(72)
A.
to plan more comprehensive
B.
to study more comprehensive
C.
to analysis more comprehensive
D.
to plan more unilateral
【简答题】给出下列代码的输出结果 print('3.5 + 2 * 2 / 3+4 is:') print(3+5-4/4+3)
【单选题】●In general,atypical (71) model is composed of several phases, such as requirements analysis phase, generaUdetailed design phase, implementation phase, system acceptance testing phase. (71)
A.
waterfall
B.
incremental
C.
spiral
D.
prototyping
【单选题】The general material DNA contains coded information for the synthesis of proteins.
A.
analysis
B.
formation
C.
absorption
D.
functioning
【简答题】设(1+x+x 2 ) n =a 0 +a 1 x+a 2 x 2 +a 3 x 3 +…+a 2n x 2n ,则a 0 +a 2 +a 4 +…+a 2n =______.
【单选题】若X~x2(n),则E(X2)=( )。
A.
372
B.
2n
C.
n2+2n
D.
n2+n
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