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搜题/搜资源
【单选题】【消耗次数:1】
<img src=https://huaweicloudobs.ahjxjy.cn/9BED0F616DF6881BC2514D4AD5C33904.png title=Unnamed QQ Screenshot20170106092536.png alt=Unnamed QQ Screenshot20170106092536.png/>
①
12
②
-12
③
24
④
-24
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<img src=https://huaweicloudobs.ahjxjy.cn/720B18640E698A9D028DBEF7491379A1.png title=Unnamed QQ Screenshot20170106131608.png alt=Unnamed QQ Screenshot20170106131608.png/>
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-2
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3
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控制电机的特点是()
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A功率小
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B体积小
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C重量轻
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D精度要求高
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机电工程施工进度控制的主要措施()
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A组织措施
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B技术措施
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C合同措施
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D经济措施
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光刻工艺包括的步骤有()。
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A.涂胶
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B.曝光
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C.显影
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D.烘胶
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MEMS执行器的驱动方式包括()。
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A.静电驱动
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B.压电驱动
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C.热驱动
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D.电磁驱动
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BGA基底金属膜由多层金属组成,具有()三个功能。
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A.减小机械强度
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B.提供对芯片I/O的黏附力
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C.提供焊料的浸润
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D.阻挡焊料与电极产生化学反应
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构成电子商务系统的主体要素包括()
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A.网络服务商
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B.电子交易市场
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C.消费者
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D.企业
⑤
E.网上银行
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少油开关属()
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A高压断路器
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B高压负荷开关
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C高压隔离开关
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D高压熔断器
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数码寄存器的功能主要是()
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A产生CP脉冲
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B寄存数码
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C寄存数码和位移
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D称位
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连接钢结构的高强度螺栓安装前,高强度螺栓连接摩擦面应进行()试验
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A贴合系数
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B扭矩
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C抗滑移系数
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D抗剪切系数
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将某个网站进行推广的方法不包括()。
①
A.更新网页
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B.建立友情链接
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C.登录搜索引擎
④
D.通用网址
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