正确答案:

题目：已知等差数列{an}，an+2=2an+1-3n+1，则第5项a5等于（　　） (A)23(B)20(C)17(D)14

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学习资料的答案和解析：

[单选题]毛泽东把重工业、轻工业和农业的发展关系问题提到中国工业化道路的高度加以论述的文章是（　　）

《关于正确处理人民内部矛盾的问题》

解析：历史知识，要记住。

[单选题]_________

根据以下内容，回答下面的题目。Insure means to protect _51_ a loss of money．Most people can budget their money so that their income will cover expected expenses _52_ food, clothing, housing, and public services．But, there is no way to know _53_ who will suffer a crisis (危机) such as a serious illness, fire, flood, or a car accident．Such crises usually _54_ great expense．Even if people could predict crises, it would be hard to save enough money to _55_ the expenses．Insurance is a system _56_ a company collects money from many individuals and then pays certain expenses whenever one of those insured individuals is faced with a certain crisis．An insurance policy _57_ how much the insurance costs and how much the company will pay when a policy holder is faced with a certain crisis．There are many different kinds of insurance, _58_ hospital, motor-car and fire．Insurance can be rather expensive but most people buy insurance of some kinD．Insurance is something _59_ people buy and hope they will _60_ need．_________

take

[单选题]__________

根据以下内容，回答下面的题目。The death of a child, _51_ one’s own child,is something the mind can hardly comprehend．It seems togo _52_ nature．The end of a life that is still forming_53_ has just begun is an almost unthinkable cruelty．But it happens．Parents sometimes must witness the illness and death of the children_54_ whom they gave birth．And _55_ will ever fill theempty place that the dead child leaves behind．Parents_56_ to die before their children, which is the natural order of life events．When the situation is reversed and a child dies _57_ the parents itseems wrong．Yet we never know why one person dies andanother lives．But we do know _58_ a child is gone, theparents still have a future, as grey and worthless as it may at first seem．Death may take the child, but the love never _59_．The sorrow after a child’s death is one ofthe longest and hardest type of _60_ to live with．And ittakes long to deal with the parents’ own emotions．__________

or

[单选题]

[多选题]参与肩关节运动的肌有（　　）

三角肌

肱二头肌

肱三头肌

胸大肌

背阔肌

[多选题]影响创口愈合的冈素为： （　　）

局部血供障碍

局部组织缺氧

创口内留有异物

肝硬变

局部制动不够

[单选题]有坐骨大切迹的是（　　）

根据以下选项，回答下面的题目：A．髂骨B．坐骨C．骶骨D．耻骨梳 E．耻骨联合 参与围成闭孔的是（　　）

[单选题]在抗凝血酶中，最重要的是（　　）

抗凝血酶Ⅲ