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【简答题】
某18层办公楼，建筑面积为32000m 2 ，总高度为71m，钢筋混凝土框架——剪力墙结构，脚手架采用悬挑钢管脚手架，外挂安全网，塔式起重机作为垂直运输工具，2012年12月7日在15层结构施工时，吊运钢管时钢丝绳滑扣，起吊离地20m后，钢f散落，造成下面作业的4名人员死亡，2人重伤。 经事故调查发现如下情况。 （1）作业人员严重违章，起重机司机因事请假，工长临时指定一名机械工操作塔式起重机，钢管没有细扎就托底兜着吊起，而且钢丝绳没有在吊钩上挂好，只是挂在吊钩的端头上。 （2）专职安全员在事故发生时不在现场。 （3）作业前，施工单位项目技术负责人未详细进行安全技术交底，仅向专职安全员口头交代了施工方案中的安全管理要求。对本起事故，专职安全员有哪些过错？
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举一反三
【单选题】The adoption of an investment tax credit in a small open economy is likely to lead to:
A.
no change in either domestic investment or domestic saving in the small open economy.
B.
an increase in both domestic investment and domestic saving in the small open economy.
C.
an increase in domestic saving but no change in domestic investment in the small open economy.
D.
an increase in domestic investment but no change in domestic saving in the small open economy.
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【判断题】机油使用过一段时间后会变脏、黏度和耐热性会变差，一定程度后无法起到对发动机的保护作用。( )
A.
正确
B.
错误
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【简答题】带轮与主动齿轮轴间的连接方式为________连接。
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【单选题】An open economy is a national economy that
A.
doesn't interact economically with the rest of the world.
B.
has a stock market that is open to traders from anywhere in the world.
C.
has extensive trading and financial relationships with other national economies.
D.
has established diplomatic relations with most other national economies.
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【单选题】如图所示,此元件的封装为那种类型?
A.
TO92A
B.
SOT23
C.
TQFP
D.
SOIC16
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【多选题】下列选用的起重钢丝绳安全系数中，正确的有______。
A.
用作缆风绳的安全系数不小于3.5
B.
用作滑轮组跑绳的安全系数不小于5
C.
用作吊索的安全系数不小于6
D.
用作载物的吊索安全系数不小于7
E.
用作载人的吊索安全系数不小于10～12
查看完整题目与答案
【单选题】A small open economy is an economy
A.
in which both imports and exports are less than 5% of GDP.
B.
whose firms and consumers are individually, but not collectively price takers.
C.
whose firms and consumers are collectively, but not individually price takers.
D.
whose firms and consumers are individually and collectively price takers.
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【单选题】Building an economic model based on the assumption of a small open economy is useful because:
A.
it accurately describes the U.S. economy
B.
it is more complicated and realistic than a model based on the assumption of a large open economy.
C.
this simplifying assumption can assist our understanding and intuition of open economy macroeconomics.
D.
it is not possible to build models of large open economies.
查看完整题目与答案
【单选题】下列 基处理方法不属于换填整层法的是( )
A.
砂石地基
B.
砂井地基
C.
灰土地基
D.
砂 地基
查看完整题目与答案
【简答题】带轮与主动齿轮轴间的连接方式为________连接。
查看完整题目与答案
相关题目：
【单选题】The adoption of an investment tax credit in a small open economy is likely to lead to:
A.
no change in either domestic investment or domestic saving in the small open economy.
B.
an increase in both domestic investment and domestic saving in the small open economy.
C.
an increase in domestic saving but no change in domestic investment in the small open economy.
D.
an increase in domestic investment but no change in domestic saving in the small open economy.
查看完整题目与答案
【判断题】机油使用过一段时间后会变脏、黏度和耐热性会变差，一定程度后无法起到对发动机的保护作用。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】带轮与主动齿轮轴间的连接方式为________连接。
查看完整题目与答案
【单选题】An open economy is a national economy that
A.
doesn't interact economically with the rest of the world.
B.
has a stock market that is open to traders from anywhere in the world.
C.
has extensive trading and financial relationships with other national economies.
D.
has established diplomatic relations with most other national economies.
查看完整题目与答案
【单选题】如图所示,此元件的封装为那种类型?
A.
TO92A
B.
SOT23
C.
TQFP
D.
SOIC16
查看完整题目与答案
【多选题】下列选用的起重钢丝绳安全系数中，正确的有______。
A.
用作缆风绳的安全系数不小于3.5
B.
用作滑轮组跑绳的安全系数不小于5
C.
用作吊索的安全系数不小于6
D.
用作载物的吊索安全系数不小于7
E.
用作载人的吊索安全系数不小于10～12
查看完整题目与答案
【单选题】A small open economy is an economy
A.
in which both imports and exports are less than 5% of GDP.
B.
whose firms and consumers are individually, but not collectively price takers.
C.
whose firms and consumers are collectively, but not individually price takers.
D.
whose firms and consumers are individually and collectively price takers.
查看完整题目与答案
【单选题】Building an economic model based on the assumption of a small open economy is useful because:
A.
it accurately describes the U.S. economy
B.
it is more complicated and realistic than a model based on the assumption of a large open economy.
C.
this simplifying assumption can assist our understanding and intuition of open economy macroeconomics.
D.
it is not possible to build models of large open economies.
查看完整题目与答案
【单选题】下列 基处理方法不属于换填整层法的是( )
A.
砂石地基
B.
砂井地基
C.
灰土地基
D.
砂 地基
查看完整题目与答案
【简答题】带轮与主动齿轮轴间的连接方式为________连接。
查看完整题目与答案