Today, most countries in the world have
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(67) {{/U}}the coast. Even in the twentieth century, goods can be
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thousand miles shorter. Other canals permit boats to reach cities that are
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{{/U}}lands where there is too much water, help to{{U}} (75)
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{{/U}}water power for factories and mills. The size of a canal A. plenty B. deal C. number D. supply [单选题]在建筑物本体上安装投光灯时,投光灯凸出长度取( )。
A.0.3~0.5 m B.0.5~1.0 m C.0.7~1.0 m D.1.0~1.5 m [判断题]( )在有砟桥上,护轨爬行严重时,允许安装防爬器。
A.正确 B.错误 [单选题]工作票由工作负责人填写,也可由( )填写。
A.A.工作监护人 B.B.工作许可人 C.C.工作票签发人 D.D.运行负责人 E.略 F.略 [多选题]肾病综合征产生全身性水肿的主要机制有()
A.血浆胶体渗透压下降 B.醛固酮分泌增多 C.抗利尿激素分泌增多 D.肝脏合成清蛋白减少 E.肾小球滤过率增加 [单选题]在道路进行灭火救援时,一般道路警戒距离不少于( )米。
A.50 B.100 C.200 D.300 [判断题]配电第二种工作票不得延期。
A.正确 B.错误 [简答题]肺通气量和肺泡通气量区别?
[判断题]电磁启动器是 主要由交流接触器和热继电器组成。( )
A.正确 B.错误 [单选题](1.00分)下列说法不正确的是()
A.六大常用水泥的初凝时间均不得短于45min B.硅酸盐水泥的终凝时间不得长于6.5h,其他五类常用水泥的终凝时间不得长于10h C.采用胶砂法来测定水泥的3d和28d的抗压强度和抗折强度,根据测定结果来确定该水泥的强度等级 D.体积安定性不良,就会使混凝土构件产生收缩性裂缝 [单项选择]下列指数中,属于数量指标指数的是( )。
A. 商品销售量指数 B. 产品价格指数 C. 设备、工器具价格指数 D. 人工费价格指数 [单项选择]粉尘性上呼吸道疾病最常见的致病方式是()。
A. 变态反应性作用 B. 直接刺激作用 C. 化学腐蚀作用 D. 致癌作用 E. 中毒反应 我来回答: 提交
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