更多“当组对铸铁M70散热器每组在超过15片时，应有1个带腿的。”相关的问题
股权投资母基金的主要业务不包括（ ）。
A.一级投资 B.二级投资 C.直接投资 D.一级半投资
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张家口市商业银行目前好运卡系列都包含哪些卡种（）
A.好运卡
B.好运薪财卡
C.好运信用卡
D.好运青年卡
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以下哪本书首次以急诊手册形式论述常见急证的应急处理：（）
A.《肘后备急方》
B.《内经》
C.《千金要方》
D.《伤寒论》
E.《外台秘要》
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钢筋套筒连接接头由（）这几个部分组成。
A.光圆钢筋 B.带肋钢筋 C.套筒 D.预埋件 E.灌浆料
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普通水罐消防车扬程可达到（）米。
A . A.1100～1300
B . B.50～70
C . C.110～130
D . D.330～350
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车辆换算闸瓦压力时，重载货物列车（轴重25t）在重车位，制动主管压力600kPa，使用铸铁闸瓦每辆换算闸瓦压力为（）。
A.360kN B.380kN C.410kN D.430kN
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关于抽样调查，下列说法错误的是（）。
A.样本需要有代表性 B.抽样需要普遍性 C.抽样样本应有随机性 D.要保证抽样数量
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贲门胃底癌的突出表现是
A．嗳气、反酸
B．营养障碍
C．大量呕吐宿食
D．食欲缺乏
E．胸骨后疼痛和进行性哽噎感
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在蓄电池的保养过程中，要定期检查电解质液面的高度，其液面应比极板上的护板高出（）mm。
A.5-10
B.10-15
C.15-20
D.20-25
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以下关于动作技能的培养，错误的是（）
A . 了解动作技能形成的特征
B . 加强学生的言语表达训练
C . 理解任务的性质和情境
D . 示范与讲解
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Text 4 To us, it seems so natural to put up an umbrella to keep the water off when it rains. But actually the umbrella was not invented as protection against rain. Its first use was as a shade against the sun. Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, way back in the 1th century B.C. We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor and authority. In the Far East, in ancient times, the umbrella was allowed to be used only by royalty or by those in high office. In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Europe to use the umbrella as protection against the rain were the ancient Romans. During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the late sixteenth century. And again it was considered a symbol of power and authority. By 1680, the umbrella appeared in France, and later on in England. By the eighteenth century, the umbrella was used against rain throughout most of Europe. Umbrellas have not changed much in style during all this time, though they have become much lighter in weight. It was not until the twentieth century that women’ s umbrella began to be made, in a whole variety of colors.
A．No one exactly knows who is the inventor of the umbrella.B．The umbrella was first invented to be used as protection against the sun.C．The umbrella changed much in style in the eighteenth century.D．In Europe the Greeks were the first to use the umbrella as a sunshade.
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Several research teams have found that newborns prefer their mothers´voices over those of other peop...What does Kathleen Wermke´s research indicate？（）
A.Babies are unable to do vocal imitation.
B.Babies’cries could be their early language acquisition.
C.Babies start speech acquisition months after their birth.
D.A crying baby is a crying baby no matter what the culture is.
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下列不属于亚里士多德所认为的政体的三要素的是（）
A、议事机能
B、监督机能
C、行政机能
D、审判机能
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同步电动机的启动转矩为（）转矩。
A.最大
B.最小
C.零
D.不一定
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英国是君主立宪制国家。君主立宪制国家和民主共和制国家的区别在于（）
A . 国家的社会性质和历史发展不同B . 国家元首在国家中的地位不同C . 国家元首在国家中的作用不同D . 国家元首产生的方式不同
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