3、命令a==round（a)作用是

A . Backing (of wind) B . Beach (to) C . Veering (of wind) D . Maintaining direction of the wind

A . toward the inside of the bend B . toward the outside of the bend C . toward the center of the river just before the bend，then change course for the river's center after the bend D . in the river's center

A . backing ( of wind ) B . beach ( to ) C . veering ( of wind ) D . maintaining direction of the wind

A . 3.141 B . 3.142 C . 3.140 D . 3.000

A . vessel not under command B . air cushion vessel in the nondisplacement mode C . vessel towing a submerged object D . vessel engaged in diving operatio

A . 正确 B . 错误

A . 对A(1)赋值为3 B . 对每个元素均赋相同的值3 C . 对简单变量A赋值3，与数组无关 D . 语法错误

A . into B . on C . over D . u

A．.T. B．10 C．30 D．.F.

A.22 B.32 C.42 D.52

Molly Wilson (1) a dancer and a mother for many years when she (2) to sail round the world to raise money for charity. As a child she (3) as a ballet dancer, but at 15 she had grown too tall for classical ballet, so she (4) (A) a member of a pop dance team. She (5) , and (6) she had children she retired from show business to bring them (7) . They grew up, and when they were 18 they left home. She says, “When I decided to do the round-the-world race, my husband thought I was bored because the children had left home. He was also worried (8) I had never sailed (9) . I was not bored, but I (10) some people who told me about the race. They had taken part in it, but they had only done one section, say, from New Zealand to Australia. I wanted to do the whole ten-month journey.3” 1) A. is B. was C. has been 2) A. decidesB. decided C. had decided 3) A. had trained B. had been trained C. was trained 4) A. became B. had become C. has become 5) A. gets married B. got married C. had married 6) A. before B. when C. after 7) A. downB. up C. out 8) A. although B. however C. because 9) A. before B. ago C. since 10) A. met B. had met C. has meet

A．查找异常文件 B．查找SUID程序 C．查找SGID程序 D．查找SUID/SGID程序

A．1 B．2 C．3 D．4

"A well-rounded mate" (Line 1, Para- 5 ) may be paraphrased as"______". A．a kind-hearted spouse B．a communicative mate C．a spouse ideal in every perspective D．a considerate and tender mate

A．a([2,3],[1,2]) B．a(2:end,1:2) C．a(2:3,linspace(1,2,2)) D．a(2:3,1:2:2)

A．t(A) B．det(A) C．solve(A) D．diag(A)

A．36.74 B．36.7367 C．36 D．37

A．plot(A(:,1),A(:,2)) B．plot(A) C．plot(A(1,:),A(2,:)) D．plot(A(1),A(2))

A．查询xyz.comcn的邮件服务器信息 B．查询xyz.com.cn到口地址的映射 C．查询xyz．com.cn的资源记录类型 D．显示xyz.com.cn中各种可用的信息资源记录