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【简答题】
求方程组的解，取初值为（1，1，1）。【图片】 A. f=@(x) [x(1)^3+x(2)-x(3)-5; 2*x(1)+3*x(2)^2-6; x(1)+x(2)+x(3)-3]; x=fsolve(f,[1,1,1],optimset('Display','off')) B. x=fsolve(@(x) [x(1)^3+x(2)-x(3)-5; 2*x(1)+3*x(2)^2-6; x(1)+x(2)+x(3)-3],[1,1,1]) C. f=@(x) [x(1)^3+x(2)-x(3)-5; 2*x(1)+3*x(2)^2-6; x(1)+x(2)+x(3)-3]; x=fzero(f,[1,1,1]) D. x=fzero(@(x) [x(1)^3+x(2)-x(3)-5; 2*x(1)+3*x(2)^2-6; x(1)+x(2)+x(3)-3],[1,1,1])
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举一反三
【单选题】A ______ man is happy with what he has.
A.
conceited
B.
competent
C.
confident
D.
contented
【单选题】What has the man done?
A.
He has been to McDonald’s.
B.
He has just quit his job.
C.
He has just applied for a job.
【单选题】What serves as the evidence that man is changing?
A.
Man has got stronger eyes now than he ever had.
B.
Man's hair is getting thinner and thinner.
C.
Man's arms and legs have become lighter and weaker.
D.
Man has been growing taller over the past 500 years.
【多选题】景区景点导游人员是该景区景点的讲解员，其主要职责包括：( )
A.
按照接待计划安排、组织游客参观和游览
B.
负责所在景区景点的导游讲解，解答游客的问题
C.
提醒游客在参观游览过程中注意安全，并给予必要的协助
D.
结合景物向游客宣讲环境、生态和文物保护知识
E.
处理在当地旅游过程中发生的问题
【简答题】景点景区导游员的主要职责是导游讲解、宣讲相关知识和
【单选题】A man's worth lies not so much in _____ he has as in ______ he is.
A.
that; what
B.
what; what
C.
that; that
D.
what; that
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