左旋多巴抗帕金森病的机制是( )A.抑制多巴胺的再摄取 B.激动中枢胆碱受体 C.阻

题型:单项选择题

问题:

左旋多巴抗帕金森病的机制是( )

A.抑制多巴胺的再摄取

B.激动中枢胆碱受体

C.阻断中枢胆碱受体

D.补充纹状体中多巴胺的不足

E.直接激动中枢的多巴胺受体

考点:中医执业助理医师中西医结合执业医师
题型:单项选择题

生活中有些人们常挂在嘴边的话,把它们的原意变变角度,就会让人产生耳目一新的感觉。依照示例,在下面的四个短语中任选两个,写出你的不同看法。要求通顺、生动,有一定的说服力。

示例

短语:无欲则刚

另一种看法:无论是走仕途,还是做生意,还是钻研学问,欲望往往是一种助推器;没有强烈的进取欲望,休想成什么大器。

⑴短语:喜怒不形于色

另一种看法:                                                                

⑵短语:一言既出,驷马难追

另一种看法:                                                               

⑶短语:世界上怕就怕“认真”二字

另一种看法:                                                               

⑷短语:走自己的路,让别人去说吧

另一种看法:                                                              

题型:单项选择题

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."

题型:单项选择题

为了弄清楚明末清初的这段历史,他到图书馆( )了大量的历史文献资料。

A.查询

B.查阅

C.翻阅

D.深入

题型:单项选择题

美国生物社会学家威尔逊认为,决定人的一切行为的本质力量是()。

题型:单项选择题

《中华人民共和国食品安全法》由中华人民共和国第十一届全国人民代表大会常务委员会第七次会议于2009年2月28日通过并予以公布,自2009年6月1日起施行。

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