你已经完成了对网络服务器的主板升级，现在需要在主板上安装附加的CPU，在主板上有两个

下列有关植物的呼吸作用和光合作用的叙述，正确的是（　　）

A．光合作用在叶绿体中进行，呼吸作用在所有活细胞中进行

B．光合作用在白天进行，呼暇作用在夜间进行

C．光合作用、呼吸作用交替进行

D．呼吸作用贮存能量，光合作用释放能量

某化学课外活动小组在实验室设计了如下图所示的实验装置，进行“氨的催化氧化”实验。

（1）A中制取气体时只用了一种药品，则该药品最好是______________（填化学式），图中空白处所需仪器应为____________________（选填下列仪器编号，固定装置省略）。

（2）该装置补充完整后，仍然存在一定缺陷，试从安全与环保的角度来考虑，对该装置进行改进①__________________________；   ②________________________________。

（3）按照改进后的装置进行实验，请完成以下问题：  

①装置B的作用_______________________________________；  

②写出C中发生反应的化学方程式：______________________________；

③若A、B处试剂足量，则装置D中可以观察到的实验现象有_______________。

曲柄连杆机构主要由（）三部分组成。

下列关于非全日制用工的说法，不符合《劳动合同法》规定的是( )

A．从事非全日制用工的劳动者与多个用人单位订立劳动合同的，后订立的合同不得影响先订立合同的履行
B．非全日制用工终止时，用人单位应当向劳动者支付经济补偿
C．非全日制用工合同不得约定试用期
D．非全日制用工劳动报酬结算支付周期最长不得超过15日

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."