[简答题]曲柄在曲柄轴上发生外移是什么原因?如何排除?-我要搜题网

[判断题] 安全绳不一定用原纤维制成。( )(易)
A.正确
B.错误

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[判断题]我国直线轨距标准规定为1435mm。
A.正确
B.错误

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[单选题]高空作业时，应穿戴救生吊带，携带（），配备防坠落辅助设备。
A.救生设备
B.安全绳
C.破拆工具
D.防护手套

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[判断题]低温或高温环境下进行高处作业，应采取保暖和防暑降温措施，作业时间不宜过长。
A.正确
B.错误

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[单选题] 防震减灾事关人民生命和财产安全,国家鼓励、引导志愿者参加防震减灾活动。()
A.正确
B.错误

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[单项选择]下列用于传递双向动力的螺纹是（）螺纹。
A. 普通粗牙
B. 普通细牙
C. 梯形
D. 锯齿形

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[判断题]ping IP -l 1000 -t命令是指向目标主机不停地发送1000字节的数据包。

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[判断题]用棍、杠撬拨电杆杆段时，应防止其滑脱伤人，用铁撬棍插入预埋孔转动杆段时应注意保护电杆。（）
A.正确
B.错误

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[单选题]女性，45岁，乏力半年，化验血白细胞2.1×109/L，血红蛋白62g/L，血小板57×109/L，骨髓形态学检查提示粒系增生活跃，原始粒细胞3%，核分叶过多，红系增生活跃，占57%，核浆发育不平衡，呈巨幼样变，有点彩红细胞，可见淋巴样小巨核细胞。染色体检查：47，XX，+8。首选的治疗为
A.EPO和沙利度胺治疗
B.糖皮质激素治疗
C.叶酸治疗
D.联合化疗
E.免疫抑制剂治疗

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[单选题]气动薄膜调节阀主要由一个执行机构和阀体组成。(1分)
A.对
B.错

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[单选题]粉尘沉积的场所严禁使用( )射流或奔跑,防止引起粉尘飞扬增加爆炸危险。、
A.直流
B.喷雾
C.幕状
D.非直流

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[填空题]Over the last two years, in the PC business Michael Dell has been beaten like a rented mule. His company continues to lose market (47) particularly in the U.S.
Industry analysts would say that Dell has done a poor job of bringing out (48) and attractive products. Apple Mac sales keep rising. HP, Sony, and Lenovo have (49) new product lines which have had warm (50) .
Dell’s core business is being hit by three things. The first is that the company was fairly late at (51) into retail outlets(零售店) overseas. It (52) on its direct sales model for too long. The second problem is that the recession has (53) Dell’s sales. Dell’s final problem is that it cannot find the right people to run the company. It (54) dumped most of the senior management that it hired just over a year ago. It takes time for new people to get up to speed.
Word has gotten out that Dell plans to launch it

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[单选题]吸收池配套性实验,玻璃吸收池600nm处装蒸馏水，在（　）nm处装重铬酸钾。."
A.300
B.400
C.500
D.600

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[多项选择]按照我国企业会计准则的规定，政府补助的主要形式有( )。
A. 财政拨款
B. 财政贴息
C. 税收返还
D. 无偿划拨非货币性资产
E. 增值税出口退税

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[单选题]安全技术部收取施工单位提交的资料，在()，组织完成对外单位《施工技术方案》审批
A.7个工作日内
B.5个工作日内
C.7日内
D.5日内

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[填空题] There seems never to have been a civilization without toys, 【B1】 when and how they developed is unknown. They probably came 【B2】 just to give children something to do. In the ancient world, as is today, most boys played with some kinds of toys and most girls 【B3】 other. In societies where social roles are 【B4】 determined boys pattern their play 【B5】 the activities of their fathers and girls after the tasks of their mothers. This is true because boys and girls are being 【B6】 . even in play, to step into the roles and responsibilities of the 【B7】 world. What is 【B8】 about the history of toys is not so much how they changed over the centuries 【B9】 how much they have remained the same. The 【B10】 have been mostly in terms of craftsmanship, mechanics, and technology. It is the universality of toys with regard to their development in all part of the world and their persistence to the present 【B11】 is amazing. In Egypt, the Americas, China, Japan and among the Arctic peoples, gen
A. A．like
B．as
C．from
D．after

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[单项选择]乙型肝炎患者血清中不能被检测到的乙肝病毒标记物为( )
A. 表面抗原
B. 表面抗体
C. e-抗原
D. 核心抗原
E. 核心抗体

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[判断题]设备局部照明或移动照明必须采用36V或24V安全电压。
A.正确
B.错误

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[判断题]LKD1-T型车站列控中心维修机中故障信息可记录20天。
A.正确
B.错误

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[简答题]《民法典》关于合同的内容由当事人约定,一般包括下列哪些条款?

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[判断题]某中外合资银行变更营业场所，必须报经中国人民银行批准。( )

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[简答题]为什么要设置“综合•探索”学习领域？