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【单选题】
上古时期族群的凝聚依靠的是:A.
外部的压力
B.
族群生活的需要
C.
自身文明的吸附
D.
人们的喜好
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举一反三
【简答题】请用括号里给出词的正确形式填空: He liked her and she felt (comfort) with him.
【简答题】设数列 前 项和为 , 满足 . （1）求数列 的通项公式; （2）令 求数列 的前 项和 ; （3）若不等式 对任意的 恒成立，求实数 的取值范围.
【简答题】函数 . （1）求 的解析式； （2）求证：函数 为奇函数； （3）若实数 满足: , 求 的取值范围
【单选题】She was slim and he liked her that way. So he called a lawyer. The result was a contract. According to the document, the fresh-faced bride agreed to pay a fine for each pound she gained in weight, the...
A.
is a part of a comedy film
B.
is something rare
C.
is something real and becoming common daily
D.
is ridiculous
【简答题】She was slim and he liked her that way. So he called a lawyer. The result was a contract. According to the document, the fresh-faced bride agreed to pay a fine for each pound she gained in weight, the...
【简答题】已知不等式 ． （1）若对 不等式恒成立，求实数 的取值范围； （2）若对 不等式恒成立，求实数 的取值范围； （3）若对满足 的一切m的值不等式恒成立，求实数 的取值范围．
【简答题】已知定义在 上的函数 是偶函数，且 时， . (1)当 时，求 解析式； （2）当 ，求 取值的集合. （3）当 ，函数的值域为 ,求 满足的条件。
【单选题】She was slim and he liked her that way. So he called a lawyer. The result was a contract. According to the document, the fresh-faced bride agreed to pay a fine for each pound she gained in weight, the...
A.
is a part of a comedy film
B.
is something rare
C.
is something real and becoming common daily
D.
is ridiculous
【简答题】已知数列{a n }满足 a 1 =3， 2-2 a n+1 a n+1 -3 = a n (n∈ N * )，记 b n = a n -2 a n +1 ． （Ⅰ）求数列{b n }的通项公式． （Ⅱ）若（4 n -1）a n ≥t?2 n+1 -17对任意n∈N * 恒成立，求实数t的取值范围； （Ⅲ）记 c n = 3 a n +1 ，求证： c 1 ? c 2 ? c 3 … c n ＞ ...
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