根据事故统计分析的目的,选择合适的统计图。下列统计图适用于直观描述伤亡事故随时间变化

题型:单项选择题

问题:

根据事故统计分析的目的,选择合适的统计图。下列统计图适用于直观描述伤亡事故随时间变化趋势的是( )。

A.散点图
B.圆图
C.线图
D.条图

考点:安全工程师安全生产管理知识安全生产管理知识
题型:单项选择题


Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.

I found, while thinking about the far-reaching world of the creative black woman, that often the truest answer to a question that really matters can be found very close. In the late 1920s, my mother ran away from home to (51) my father. Marriage, if not running away, was (52) of seventeen-year-old girls. By the time she was twenty, she had two children and was pregnant (53) a third. Five children later, I was born. And this is how I (54) to know my mother: she (55) a large, soft, loving-eyed woman who was (56) impatient in our home. Her quick, violent temper was on (57) only a few times a year, when she (58) with the white landlord who had the misfortune to suggest to her that her children did not need to go to school. She made all the clothes we wore, even my brother’s (59) . She made all the towels and sheers we used. She spent the summers canning vegetables and fruits. She spent the winter evenings making quilts (60) to cover all our beds.

A.marry

B.marry with

C.marry in

D.marry above

题型:单项选择题

诊断恶性组织细胞病的主要实验室检查有()

A.周围血象

B.组织活检

C.X线检查

D.B超

E.骨髓象

题型:单项选择题

(多选)如图甲所示电路中,理想变压器原、副线圈的匝数比n1:n2=6:1,L为电感线圈、C为电容器、R为定值电阻.当原线圈两端接有如图乙所示的交流电时,三只灯泡都能发光.如果保持原线圈两端的电压最大值不变,而将其频率变为原来的2倍,下列说法中正确的是(  )

A.灯泡Ⅱ变亮

B.灯泡Ⅲ变亮

C.副线圈两端的电压有效值为12V

D.副线圈两端的电压有效值为6V

题型:单项选择题

关于脑白质营养不良不正确的是()。

A.脑白质营养不良是一组由于遗传因素导致髓鞘形成缺陷,不能完成正常发育的疾病

B.异染性脑白质营养不良是一种神经鞘脂沉积病

C.肾上腺脑白质营养不良是一种脂质代谢障碍病

D.异染性脑白质营养不良幼儿型多见,男多于女,2岁后发病,肾上腺脑白质营养不良多在儿童期(5~14岁)发病,通常均为男孩

E.脑白质营养不良预后好,可长期存活

题型:单项选择题

痰白而清稀,或有灰黑点者,属于

A.风痰

B.湿痰

C.热痰

D.燥痰

E.寒痰

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