已知tanx=6,那么12sin2x+13cos2x=______.

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问题:

已知tanx=6,那么
1
2
sin2x+
1
3
cos2x=______.
考点:同角三角函数的基本关系式
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小刘撰写了一篇题为"我国汽车制造业发展研究和预测"的统计分析报告,报告仅就我国汽车的销售收入进行了分析和预测。此文标题存在的问题主要是()。

A.缺乏新意

B.不够精炼

C.标题过长

D.与内容不一致

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派生定密,是指根据其他单位产生的国家秘密而产生的新的国家秘密。派生的国家秘密的密级和保密期限要与原载体的相一致。()

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阅读下面短文,根据所给语境,按要求完成下列各题。

Linda usually gets up early in the morning. She 【1】has breakfast at six thirty. And she goes to school at around seven o’clock. Usually she gets to school at seven fifty. Ten munites(分钟)later(以后)school starts. She has four classes in the morning. At twelve fifteen, she eats 【2】   at school. In the afternoon she isn’t very busy. 【3】After school she does her homework . In the evening her parents come back from work. Her mother cooks(烹饪) dinner and then they have dinner together. After dinner Linda and her mother often read books or listen to music. Sometimes they watch TV. 【4】Linda goes to bed at nine thirty. But her father works late at night.

小题1:写出【1】处短语的近义词。       

小题2:在【2】处填一个合适的单词。        

小题3:将【3】处的划线的句子翻译为汉语。                                 

小题4:就【4】处的划线部分提问。                                   

题型:填空题

“这场球赛,或者英国队胜,或者德国队胜,或者两队踢平;德国队没有胜,英国队也没有胜;所以,两队踢平。”该推理属于______

A.联言推理
B.选言推理
C.假设推理
D.二难推理

题型:填空题

在二叉树的顺序存储中,每个节点的存储位置与其父节点、左右子树节点的位置都存在一个简单的映射关系,因此可与三叉链表对应。若某二叉树共有n个节点,采用三叉链表存储时,每个节点的数据域需要d个字节,每个指针域占用4个字节,若采用顺序存储,则最后一个节点下标为k(起始下标为1),那么采用顺序存储更节省空间的条件是 (39)

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