起重机械事故中，重物失落事故包括( )。A．升降设备的挤伤事故_爱下问搜题

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问题单项选择题

起重机械事故中，重物失落事故包括( )。

A．升降设备的挤伤事故、机体与建筑物间的挤伤事故、机体回转挤伤事故、翻转作业中的挤伤事故
B．机体撞击坠落事故、轿箱坠落摔伤事故、振动坠落事故、制动下滑坠落事故
C．脱绳事故、脱钩事故、断绳事故、吊钩断裂事故
D．断臂事故、倾翻事故、机体摔伤事故、相互撞毁事故

答案

参考答案：C

解析：本题考核的是重物失落事故的类型。常见的失落事故有脱绳事故、脱钩事故、断绳事故、吊钩断裂事故。选项A事故属于挤伤事故；选项B事故属于坠落事故；选项D事故属于机体毁坏事故。

完形填空

People in different countries have different ways of doing things. Something　is 1 in one country, but it may be quite impolite in another. In Britain, you mustn`t lift your bowl to your 2 when you are having some liquid(液体)food. But it’s 3 in China. And in Japan you even needn`t worry about making 4 while you are having it . It shows that you`re enjoying it . But people in Britain think it is bad manners . If you are a visitor in Mongolia ,what manners do they wish 5 to have ? They wish you to have a loud“burp”( 打嗝) 6 you finish eating .Burping shows that you like the food .
In Britain , you should try not to 7 your hands on the table when you’re having a meal .But in Arab (阿拉伯)countries you must be very careful with your hands . You 8 eat with your left hand .Arabs consider (认为)it very 9 manners eating with left hands .So when you are in other countries , 10 carefully and follow them .As a saying goes , “Do as the Romans do .”

小题2:A.mouth B…nose C. ears D. eyes

C．shouldn’t

单项选择题

不确定性分析与风险分析的主要区别在于( )。

A．两者的分析结果、方法和作用不同

B．两者的分析内容、方法和作用不同

C．两者仅有分析内容及分析结果不同

D．两者分析方法和作用不同，但分析内容及结果相同