【单选题】【消耗次数:1】
I _______ sleep very well, but then I started doing yoga and it really helps.
didn’t use to
used to
was used to
wasn’t used to
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【单选题】 I used to ( ) if I didnt get at least six hours sleep at night.
①  moaning
②  moat
③  moan
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【单选题】 I used my drivers license as ( )
①  identification
②  identity
③  identify
④  identifying
【判断题】 I’m not used to spicy food.
①  正确
②  错误
【单选题】 I am not used to speaking ________ public.
①  in
②  at
③  on
④  to
【判断题】 I dont swim now, but I used to do when I was a kid.
①  正确
②  错误
【单选题】 What are very commonly used teaching procedures and stages?
①  Presentation, practice and production
②  Pre-reading, while-reading and post-reading
③  Mechanical practice and meaningful practice
④  Both A and B.
【单选题】 Tom used to get up late, _____ he?
①  used
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③  did
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【单选题】 She took it as an insult which wasn’t at all what I( ).
①  intend
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①  but
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③  and
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随机题目
【单选题】 设 G 是 n (n32)阶 n + 1 条边的无向简单连通图, 则以下哪个性质不正确:
①  存在顶点 v, d(v)33;
②  所以顶点度数之和等于2(n + 1);
③  至少有两个顶点不是割点;
④  奇度顶点个数可以不是偶数个。
【单选题】 下列与树的定义不等价的是:
①  连通且m=n-1;
②  含最少边的连通图;
③  连通且任意删除一条边会变不连通;
④  不含有回路的图。
【单选题】 判断下面哪个类不全是欧拉图:
①  完全图 Kn (n 3 3);
②  n (n 3 2)阶有向完全图;
③  完全图 Kn (n 3 3,n 为奇数);
④  完全二部图 Kr, s(r, s均为正偶数)。
【单选题】 设完全图 Kn (n 3 3)的顶点分别为 v1, v2, … , vn. 问 Kn 中有多少条不同的哈密顿回路:
①  1;
②  n;
③  n!;
④  (n - 1)! 。
【单选题】 设无向树 T 有2 个 2 度分支点, 3 个 3 度分支点, 其余的都是 叶子, 问 T 有多少片叶子:
①  4;
②  5;
③  6;
④  7。
【单选题】 设有向图D = áV, E?, 其中 V={v1, v2, v3, v4, v5}, E={áv4, v1?, áv1, v1?,áv1, v2?,áv1, v3?, áv3, v1?, áv5, v3?},则v1的闭邻域 N(v1) =
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②  {v2, v3,v4};
③  {v1, v2, v3, v4};
④  {v2,v3}。
【单选题】 下面正整数数列中, 哪个不能充当无向树的度数列:
①  (1, 1, 1, 1, 2, 2, 3, 3);
②  (1, 1, 1, 1, 2, 2, 2, 3, 3);
③  (1, 1, 1, 1, 1, 2, 2, 3, 3, 3);
④  (1, 1, 1, 1, 2, 3, 3, 4)。
【单选题】 对于5阶完全图 K5,下面哪个说法是正确的:
①  既不是欧拉图也不是哈密顿图;
②  是欧拉图非哈密顿图;
③  是哈密顿图非欧拉图;
④  既是欧拉图又是哈密顿图。
【单选题】 设 T=为图 G=的生成树, 则下列哪个正确:
①  |V1|=|V0|且|E1|=|E0|;
②  |V1|=|V0|且|E1|=|E0|;
③  |V1|=|V0|且|E1|
④  |V1|=|V0|且|E1|=|E0|。
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③  n - 1;
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