粉尘爆炸产生的冲击波将堆积的粉尘扬起,在新的空间形成爆炸极限浓度范围内的混合物,遇到

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问题:

粉尘爆炸产生的冲击波将堆积的粉尘扬起,在新的空间形成爆炸极限浓度范围内的混合物,遇到新的点火源再次发生爆炸的现象称为( )。

A.二次爆炸

B.爆炸感应

C.气固两相流反应

D.爆炸上升

考点:安全工程师安全生产技术安全工程师安全生产技术真题2009年
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下列各组词语中,没有错别字的一组是(  )

A.熟稔 制高点 牙牙学语 新浴者必振衣

B.笼络 增值税 掎角之势 时事造英雄

C.幌子 编者按 失口否认 树倒猢狲散

D.花哨 座标系 指手画脚 毕其功于一役

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犬细小病毒疫苗的首次免疫时间一般应在()

A,1.5-3月龄

B.4-5月龄

C.6-7月龄

D.8-9月龄

E.10月龄

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要把建设资源节约型和环境友好型社会作为加快转变经济发展方式的()。

A.着眼点

B.支撑点

C.突破点

D.着力点

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Of all the employed workers in the United States, 12.5 million are part of a temporary workforce. The United States Bureau of Labor Statistics counts 9.2 percent of workers as those who have______(1) they term "alternative employment arrangements." The government predicts that temporary staffing agencies______(2) experience growth of 49 percent by 2010. If numbers increase at the rate ______ (3), these companies will add 1.9 million new jobs by 2010. That’’s more than any______(4) industry.Temporary workers were the first ones to be affected by the recent economic recession, but they are______(5) to be the first to regain positions as the economy picks up and companies work to rebuild. Employers use temporary workers as a resource because_______(6) offer flexibility and come at a low cost. Many temporaries are categorized as "independent contractors" instead of employees,______(7) allows the employer to avoid______(8) certain taxes. Because they are not required to offer benefits to temporary workers, companies can save a great deal of money by hiring temps. Usually, temporary workers can qualify_______(9) benefits if they work for a staffing company for a certain length of time. Most temps, however, do not continue with one company long______(10) to qualify for them because they regard the position as a step on the ladder to a______(11) position later.According to Richard Wahlquist, president of the American Staffing Association, 75_______(12) of temporary workers hope for transition out of the temporary staffing category______(13) a period of time. Wahlquist finds that temporary workers spend about 11 weeks on various assignments before their______(14) out of the temporary workforce. Many use temporary positions to gain experience and skills______(15) they move on to better jobs. Wahlquist says that the temp workforce as a whole turns______(16) 400 percent each year.Tom Dilworth, research director at the Employment Policies Institute, explains______(17) some workers like having temporary jobs______(18) it affords them a great deal of elasticity with time and everything. Some temps only have a limited______(19) of time to work and temp agencies can help coordinate jobs to fit their schedules. Other sometimes-employees use temporary jobs to get an______(20) to a company from the inside, to get a foot in the door of a certain business or career._______(21) others take temporary positions in hopes their employers will change them over to permanent positions eventually.Nearly all the industries in the United States use temporary workers.______(22) to Tim Costello, coordinator of the North American Alliance for Fair Employment, the growth of temporary labor threatens______(23) job security of permanent workers who fear replacement, as well as the temps who are more accustomed to turnover. He predicts that there will continue to______(24) a gradual shift from permanent employees to contingent staffing, and that such a_____(25) in workplace demographics will "lead to lower wages, poorer working conditions, and more instability."

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零售环节对某种商品课税,厂商设法通过压低进货价格把税负逆转给批发商,批发商再转给产制企业,产制企业又通过压低原料价格、劳动力价格(工资)或延长工时等办法,把税负转嫁给原料供应者和雇佣工人。这种税收转嫁方式属于()。

A.前转

B.后转

C.消转

D.税收资本化

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