LEC方法(又称作业条件危险性分析法或格雷厄姆-金尼方法),将可能造成安全风险的大小

题型:单项选择题

问题:

LEC方法(又称作业条件危险性分析法或格雷厄姆-金尼方法),将可能造成安全风险的大小用事故发生的可能性(L)、人员暴露于危险环境中的频繁程度(E)和事故后果(C)三个随机自变量的乘,积来衡量,即:R=L·E·C。式中的E表示( )。

A.风险大小
B.事故发生的可能性
C.人员暴露于危险环境中的频繁程度
D.事故后果的严重程度

考点:一级建造师建设工程项目管理建设工程项目管理
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用伏安法测一节干电池的电动势E和内电阻r,所给的器材有:

(A)电压表V:0-3-15V;

(B)电流表A:0-0.6-3A;

(C)变阻器R1(总电阻20Ω);

(D)变阻器R2(总电阻100Ω);以及电键S和导线若干.

(1)你觉得应该选择上面给出的变阻器中总电阻为______Ω的变阻器.

(2)如图所示的U-I图上是由实验测得的7组数据标出的点,请你完成图线.

(3)由图线求得r=______Ω.

题型:单项选择题

麻醉过程中二氧化碳蓄积后,如排出过快,可能出现

A.血压上升、呼吸变慢
B.血压上升、呼吸变快
C.血压、呼吸均无变化
D.血压下降、呼吸暂停

题型:单项选择题

直流电动机有哪几种调速方法?

题型:单项选择题

HIV感染者可出现的皮肤肿瘤有

A.Kaposi肉瘤

B.皮肤淋巴瘤

C.恶性黑色素瘤

D.鳞状细胞癌

题型:单项选择题

Jeanne Calment, a French woman, became a record breaker on 17 October of 1995, when at the age of 120 years and 238 days , she became the longest-lived human being on record. A Japanese man died in 1986 at the age of 120 years and 237 days.

Jeanne Calment lives in a small old people’s home in the south of France; her husband, her only child and her grandson have all died. She is nearly blind and deaf and she is always in a wheelchair, but her doctor describes her as being more like a 90-year-old in good health than someone of 120. She still has a lively sense of humor. When asked on her 120th birthday what she expected of the future, she replied: A very short one. She also remarked that she thought the good Lord had forgotten all about her.

So what is the key to a long life According to some doctors, diet, exercise and no smoking are the three important factors. Jeanne Calment has followed two of the tips. She has always eaten a healthy diet, and she used to do exercises every day until she broke her leg at the age of 115. However, until recently she drank two glassed of p red wine a day, and she does smoke (now only a little). Besides, Jeanne Calment might have got very good genes from her parents. Her father lived to the age of 94 and her mother to 86.

A local lawyer bought her house when she was 80 under an agreement that he would pay her some money every year until her death. It must have seemed a good move at the time, but so far the lawyer has paid her at least three times the value of the house. Every year on her birthday Jeanne Calment sends him a card saying: Sorry, I’m still alive !

Jeanne Calment owes her good health and long life to()

A.smoking only a little every day

B.her giving up smoking and drinking

C.drinking two glasses of p red wine every day

D.the good genes from her parents, a healthy diet and some exercises

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