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搜题/搜资源
【单选题】【消耗次数:1】
He looked at the little girl, _________ where he had seen her before.
①
wondering
②
wondered
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相关题目
【单选题】
Zhang Hua opened the door .There______ he had never seen before.
①
did a girl stand
②
stood a girl
③
a girl stood
④
a girl did stand
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【单选题】
He said that he ?[填空] not seen her that day .
①
has
②
have
③
having
④
had
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【单选题】
、Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only ____ to his confusion.
①
extended
②
amounted
③
added
④
turned
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【单选题】
His parents did not approve of his plan to go and study abroad with a girl they had never met, but he ____ and married her.
①
went against
②
went for
③
went for nothing
④
went ahead
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【单选题】
Before he came to New York, he had never heard a single English word().
①
speak
②
to speak
③
spoke
④
spoken
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【判断题】
Before he began to study in the university, he had worked in a company for three years.
①
正确
②
错误
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【多选题】
_____________ , he had to stay at home to look after her.
①
His mother being ill
②
His mother ill
③
Although his mother was ill
④
As his mother was ill
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【判断题】
She is under the impression that he isn’t a __genuine____ person for he wouldn’t tell her where and when he went to university.
①
正确
②
错误
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【单选题】
“ Has he seen this film ? ” “Yes. He _________ it several days ago.”
①
saw
②
has seen
③
had seen
④
was seeing
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【单选题】
A: Where does he come from? B: [填空], but her accent suggests Beijing.
①
Im sure
②
Im not sure
③
Perhaps
④
Maybe
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随机题目
【多选题】
设前提: p?r, ?q?p, ?r. 则下面哪些是其有效结论:
①
?q?r
②
p.
③
?p
④
q
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【多选题】
设函数f: S?R, S=[0, +∞), f(x)=1/(x+1),则它是:
①
满射;
②
单射;
③
双射;
④
函数.
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【多选题】
公式“(pùq) ú (?púr)”的主合取范式中极大项下标没有:
①
0.
②
2.
③
4.
④
6.
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【多选题】
下列哪些不是命题
①
前天的雪是银色的;
②
那个男孩真帅;
③
x + y = z;
④
1+2=12。
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【多选题】
令 F(x): x 是汽车, G( y): y 是火车, H(x, y): x 比 y 跑得快,则命题“有的火车比所有的汽车跑得快”符号化不正确的有:
①
$x$y(F(x) ù G( y) ù H(x, y))
②
x$y(F(x) ù G( y) ? H(x, y))
③
$xy(F(x) ù (G( y) ? H(x, y)))
④
$xy(F(x) ù G( y) ù H(x, y)).
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【多选题】
下列推理的形式结构中不是有效推理的有:
①
(púr) ? p
②
(p?q) ùq?p.
③
(p?r) ùp?r
④
(p?q) ù?p??q
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【多选题】
设前提: pù?q ? r, p, q ? s, ?s. 则下面哪些是其有效结论:
①
r
②
?q.
③
q?p
④
q
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【多选题】
令 F(x): x 是汽车, G( y): y 是火车, H(x, y): x 比 y 跑得快,则命题“说所有的火车比所有的汽车跑得快是不对的”符号化不正确的有:
①
x$y(F(x) ù G( y) ? H(x, y))
②
$x$y(F(x) ù G( y) ù H(x, y))
③
xy(F(x) ù (G( y) ? H(x, y)))
④
$xy(F(x) ù G( y) ù H(x, y)).
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【判断题】
设 p: 2+3=5. q: 大熊猫产在中国. r: 复旦大学在广州. 则复合命题公式“(pùqù?r) ? (( ?pú?q) ?r)”的真值为假。
①
正确
②
错误
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【判断题】
命题“若 3+2=4, 则地球是静止不动的”的真值为真。
①
正确
②
错误
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