主页
学科
搜索
账户
常见问题
当前学科:电子商务运营专才
题目:
单选
用万用表R×1000挡,检查电容器(容量较大)时,下列()现象说明电容器的质量是良好的。
A . 指针满偏转后不动
B . 指针满偏转后,不能返回到原刻度处
C . 指针不动
D . 指针满偏转后,逐步返回到原刻度处
答案:
<查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索
推荐知识点:
根据以下资料,回答题。The social sciences are flourishing.As of 2005,there were almost half a million professional social scientists from all fields in the world, working both inside and outside academia. According to the World Social Science Report 2010,the number of social-science students worldwide has swollen by about 11% every year since 2000.Yet this enormous resource in not contributing enough to today’s global challenges including climate change, security,sustainable development and health.(41)______Humanity has the necessary agro-technological tools to eradicate hunger , from genetically engineered crops to arificial fertilizers . Here , too, the problems are social: the organization and distribution of food, wealth and prosperity.(42)____This is a shame—the community should be grasping the opportunity to raise its influence in the real world. To paraphrase the great social scientist Joseph Schumpeter:there is no radical innovation without creative destruction .Today ,the social sciences are largely focused on disciplinary problems and internal scholarly debates,rather than on topics with external impact.Analyses reveal that the number of papers including the keywords “environmental changed” or “climate change” have increased rapidly since 2004,(43)____ When social scientists do tackle practical issues ,their scope is often local:Belgium is interested mainly in the effects of poverty on Belgium for example .And whether the community’s work contributes much to an overall accumulation of knowledge is doubtful. The problem is not necessarily the amount of available funding (44)____this is an adequate amount so long as it is aimed in the right direction. Social scientists who complain about a lack of funding should not expect more in today’s economic climate.The trick is to direct these funds better.The European Union Framework funding programs have long had a category specifically targeted at social scientists.This year,it was proposed that system be changed:Horizon 2020,a new program to be enacted in 2014,would not have such a category ,This has resulted in protests from social scientists.But the intention is not to neglect social science ; rather ,the complete opposite.(45)____That should createmore collaborative endeavors and help to develop projects aimed directly at solving global problems. 请在第____处填上正确选项。
简述一份完整的公文在格式上有哪些要素组成。
电力系统有功功率不平衡会引起什么反响?怎样处理?
以下物品中,()是不绝缘的。
采购双方通过谈判对采购产品的相关内容和要求进行反复(),达成协议,建立采购关系。
触酶试验又称()
已知:MT公司2000年初所有者权益总额为1500万元,该年的资本保值增值率为125%(该年度没有出现引起所有者权益变化的客观因素)。2003年年初负债总额为4000万元,所有者权益是负债的1.5倍,该年的资本积累率为150%,年末资产负债率为0.25,负债的年均利率为10%,全年固定成本总额为975万元,净利润为1005万元,适用的企业所得税税率为33%。要求:根据上述资料,计算MT公司的下列指标:
图样中,机件的可见轮廓线用()画出,不可见轮廓线用()画出,尺寸线和尺寸界限用细实线画出,对称中心线和轴线用细点划线画出。
文章的表现工具是()。
男性,31岁。驾车翻入河中,被救起后送当地县医院。入院诊断:①左胸3、4、5、6肋骨骨折、血气胸;②左前臂尺桡骨骨折;③右大腿股骨中1/3骨折。当即施行左胸腔闭式引流、尺桡骨及股骨切开复位内固定术。术后始终左胸疼痛,呼吸困难。于第3天转入我院。检查:T37.0℃,P100次/分,R24次/分.BP120/60mmHg。面色苍白,不能平卧。胸腔闭式引流管不通畅。左胸呼吸动度明显减弱,叩诊呈实音,呼吸音显著降低。上腹部轻压痛。对该患者首先要做的检查是().