在大气腐蚀条件下,锡镀层对钢铁是阴极性镀层。

题型:判断题

问题:

在大气腐蚀条件下,锡镀层对钢铁是阴极性镀层。

考点:化学工程电化学工程电化学工程题库
题型:判断题

患者女性,32岁。右手外伤于门诊急行清创缝合术。

病人局部注射1%普鲁卡因1Oml5分钟后,感头痛、头晕、耳鸣、呼吸困难,继而出现烦躁,应考虑为()

A.局麻药中毒

B.疼痛

C.局麻药高敏反应

D.变态反应

E.中枢神经症状

题型:判断题

Since we are social beings, the quality of our lives depends in large measure on our interpersonal relationships. One strength of the human condition is our tendency to give and receive support from one another under stressful circumstances. Social support consists of the exchange of resources among people based on their interpersonal ties.

Those of us with p support systems appear better able to cope with major life changes and daily hassles (困难). People with p social ties live longer and have better health than those without such ties. Studies over a range of illnesses, from depression to heart disease, reveal that the presence of social support helps people fend off (挡开) illness, and the absence of such support makes poor health more likely.

Social support cushions stress in a number of ways. First, friends, relatives, and co-workers may let us know that they value us. Our self-respect is strengthened when we feel accepted by others despite our faults and difficulties. Second, other people often provide us with informational support. They help us to define and understand our problems and find solutions to them. Third, we typically find social companionship supportive. Engaging in leisure-time activities with others helps us to meet our social needs while at the same time distracting (转移……注意力) us from our worries and troubles. Finally, other people may give us instrumental support—financial aid, material resources, and needed services—that reduces stress by helping us resolve and cope with our problems.

Social companionship is beneficial in that ().

A. it helps strengthen our ties with relatives

B. it enables us to eliminate our faults and mistakes

C. it makes our leisure-time activities more enjoyable

D. it draws our attention away from our worries and troubles

题型:判断题

挥发分中不含有的成分是()。

A.碳

B.氢

C.氧

D.灰分

题型:判断题

电力系统暂时过电压

题型:判断题

设置终端A为要求发送报告,设置终端B为立即取方式和请求不发送发送报告,MMSC设置允许发送报告选项,终端A往终端B发送彩信,请问终端A能收到发送报告吗?()

A.能

B.不能

C.不确定

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