【判断题】【消耗次数:1】
He is less careful than his sister.
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错误
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相关题目
【判断题】 He is not as clever as his sister.
①  正确
②  错误
【单选题】 In the past he often made his sister___, but now he is often made __by his sister.
①  to cry; to cry
②  cry
③  to cry; cry
④  cry; to cry
【单选题】 The girl is not so [填空] as his sister.
①  worrying
②  worried
③  worry
④  worries
【单选题】 Mark sometimes [填空] to the cinema with his sister.
①  go
②  gos
③  goes
④  going
【单选题】 He said that his sister ?[填空]been there one week before
①  had
②  has
③  have
④  will have
【判断题】 A: Who is the girl? B: She is my sister.
①  正确
②  错误
【单选题】 7. As a teacher, he thinks his business is to stir up__________in his studentsrather than insist on obedience.
①  observation
②  curiosity
③  superiority
④  judgment
【单选题】 Short-term memorylasts less than _________.
①  seconds
②  weeks
③  months
④  years
【单选题】 30. Mary is ______ hardworking than her sister, but she failed in the exam.
①  no less
②  no more
③  not less
④  not so
【单选题】 Scarcely less important than machinery in the agricultural revolution was science.
①  A. 在农业革命中,科学没有机械重要。
②  B. 在农业革命中,机械没有科学重要。
③  C. 在农业革命中,科学和机械几乎同等重要。
④  D. 在农业革命中,机械和科学都不怎么重要。
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【简答题】 自然数里,a=2,f (x,y)=x+y,g (x,y)=x·y,F (x,y): x=y。公式“$xF(f(x,x),g(x,x))”的真值:[填空1]
【判断题】 设 Ri 是 X 上的二元关系, 对于 x∈X 定义集合Ri(x)={y|xRiy}. 如果 X={-4, -3, -2, -1, 0, 1, 2, 3, 4}, 且令R2={|x, y∈Xùy-1y+2},则R2(-1) ={ -2, -1}.
①  正确
②  错误
【判断题】 {2,22,32,43,33,44,4}是集合 A={2, 3, 4}上的小于等于关系。
①  正确
②  错误
【判断题】 公式“x$y(F(x, y) ù G(y, z)) ú $xH(x, y, z)”中的全称量词x的辖域为:$y(F(x, y) ù G(y, z)) 。
①  正确
②  错误
【判断题】 设函数f: S?R, S=[0, +∞), f(x)=1/(x+1),则它是单射不是满射。
①  正确
②  错误