用seq函数，生成向量X= (1,2,3,4,5,6,7,8,9,10)的命令是 A: X<-seq[1:10] B: X<-seq(1, by = 1, length.out = 1) C: X<-seq(1, by = 10, length.out = 1) D: X<-seq(1, by = 1, length.out = 10)

中国大学MOOC: TCP连接建立的过程通过双方的报文传输实现，请给出以下报文的发送顺序(1) SYN = 1, ACK = 1, seq = y, ack= x + 1(2) ACK = 1, seq = x + 1, ack = y + 1(3) SYN = 1, seq = x

TCP建立连接过程中，A、B方的初始序号seq分别是X、Y，A发送SYN=1,seq=X的报文段给B，B收到后发送（ ）报文段给A，A再发送一个确认段给B，A和B建立了连接。 A: SYN=0,seq=X+1,ACK=1,ack=X B: SYN=1,seq=Y,ACK=1,ack=X+1 C: SYN=1,seq=Y,ACK=0,ack=X D: SYN=1,seq=X+1,ACK=1,ack=X+1

‎ TCP连接建立的过程通过双方的报文传输实现，请给出以下报文的发送顺序‎(1) SYN = 1, ACK = 1, seq = y, ack= x + 1‎(2) ACK = 1, seq = x + 1, ack = y + 1‎(3) SYN = 1, seq = x‎‎ A: (3)(2)(1) B: (3)(1)(2) C: (1)(2)(3) D: (2)(3)(1)

绝对值不等式|3x-12|≤9的解为______ A: 1≤x≤17 B: -1≤x≤7 C: 1≤x≤7 D: 1≤x≤27 E: 以上结论均不正确

set1 = {x for x in range(10) if x%2!=0} set1.remove(1) print(set1) 以上代码的运行结果为？ A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}

set1 = {x for x in range(10) if x%2!=0} print(set1) 以上代码的运行结果为？ A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}

Simplify the expression:$({\frac{3x^{3/2}y^3}{x^2y^{-1/2}})^{-2}}$Which answer is CORRECT? A: $9xy^7$ B: $\frac19 xy^{-7}$ C: $\frac19 x^{-1}y^7$ D: $9 x^{-1}y^7$

以4，9，1为为插值节点，求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)

MP2的压缩率是（）。 A: 6：1~8：1 B: 7：1~8：1 C: 8：1~9：1 D: 7：1~9：1