不等式7x-2（10-x）≥7（2x-5）非负整数解是[ ] A.0，1，2 B

一个圆的周长是62.8米，它的半径是______米．

赵本山二十多次登上中央电视台春晚舞台，多次获得全国“小品王”的称号，参加制作、拍摄和演出过十余部影视剧，成为中国家喻户晓的传奇人物。当代文坛领军者王蒙称之为“赵本山文化革命现象”。“赵本山文化革命现象”的出现主要得益于(　　)

A．“发展才是硬道理”方针的提出

B．“二为”方向和“双百”方针的指导

C．对外开放格局的初步形成

D．知识分子建设社会主义积极性的提高

钢筋原材力学性能的检验项目包括( )。

A．屈服强度

B．极限抗拉强度

C．90°冷弯

D．180°冷弯

The brains of identical twins are genetically identical. When only one of a pair of identical twins is a schizophrenic, certain areas of the affected twin’s brain are smaller than corresponding areas in the brain of the unaffected twin. No such differences are found when neither twin is schizophrenic. Therefore, this discovery provides definitive evidence that schizophrenia is caused by damage to the physical structure of the brain.
Which one of the following is an assumption required by the argument

A．The brain of a person suffering from schizophrenia is smaller than the brain of anyone not suffering from schizophrenia.

B．The relative smallness of certain parts of the brains of schizophrenics is not the result of schizophrenia or of medications used in its treatment.

C．The brain of a person with an identical twin is no smaller, on average, than the brain of a person who is not a twin.

D．When a pair of identical twins both suffer from schizophrenia, their brains are the same size.

E．(E) People who have an identical twin are no more likely to suffer from schizophrenia than those who do not.

绞车需长时间停车时，应先停（）。

A、辅助泵

B、主泵

C、电

D、过滤器