某精馏塔精馏段理论板数为N1层,提馏段理论板数为N2层,现因设备改造,使提馏段的理论

题型:单项选择题

问题:

某精馏塔精馏段理论板数为N1层,提馏段理论板数为N2层,现因设备改造,使提馏段的理论板数增加,精馏段的理论板数不变,且F、xF、q、R,V等均不变,则此时()。

A、xW减小,xD增加

B、xW减小,xD不变

C、xW减小,xD减小

D、xW减小,xD的变化视具体情况而定。

考点:化工总控工考试化工总控工高级化工总控工高级题库
题型:单项选择题

进行基本农田调查工作时,调查上图是将基本农田保护片等相关信息落实到分幅土地利用现状图上,确定基本农田图斑,并依据相关标准和规范,检查基本农田要素层的______等是否符合要求。

A.数据格式

B.属性结构

C.上图精度

D.数据内容

E.布局分布

题型:单项选择题

下列关于钠、钾的叙述不正确的是

A.二者遇水都能剧烈反应

B.二者在自然界中都以化合态存在

C.钠钾合金常温下是液体

D.钾能从氯化钠溶液中置换出钠单质

题型:单项选择题

如图,一个球形物体O静止放在水平地面上,并与竖直墙相接触,A、B两点是球与墙和地面的接触点,则下列说法正确的是(  )

A.物体受三个力,重力、B点的支持力、A点的弹力

B.物体受二个力,重力、B点的支持力

C.物体受三个力,重力、B点的支持力、物体对墙壁的压力

D.物体受三个力,重力、B点的支持力、物体对地面的压力

题型:单项选择题

Scores of workers from MTV Networks walked off the job yesterday afternoon, filling the sidewalk outside the headquarters of its corporate parent, Viacom, to protest recent changes in benefits. The walkout highlighted the concerns of a category of workers who are sometimes called permalancers: permanent freelancers who work like full-time employees but do not receive the same benefits.

Waving signs that read "Shame on Viacom," the workers, most of them in their 20s, demanded that MTV Networks reverse a plan to reduce health and dental benefits for freelancers beginning On Jan. 1st. In a statement, MTV Networks noted that its benefits program for full-time employees had also undergone changes, and it emphasized that the plan for freelancers was still highly competitive within the industry. Many freelancers receive no corporate benefits. But some of the protesters asserted that corporations were competing to see which could provide the most mediocre health care coverage. Matthew Yonda, who works at Nickelodeon, held a sign that labeled the network "Sick-elodeon. " "I’ve worked here every day for three years-I’m not a freelancer," Mr. Yonda said. "They just call us freelancers in order to bar us from getting the same benefits as employees. "

The changes to the benefits package were announced last Tuesday. Freelancers were told that they would become eligible for benefits after 160 days of work, beginning in January. While that eased previous eligibility rules, which required freelancers to work for 52 weeks before becoming eligible, it would have required all freelancers not yet eligible for benefits to start the waiting period over again on Jan. 1st. The 401 (k) plan was also removed. On Thursday, acknowledging the complaints, MTV Networks reinstated the 401 (k) plan and said freelancers who had worked consistently since March would be eligible.

Fueled by a series of blog posts on the media Web site Gawker-the first post was headlined "The Viacom Permalance Slave System"-a loose cohort of freelancers created protest stickers and distributed walkout fliers last week. Caroline O’Hare, a unit manager who has worked for MTV for more than two years, said the new health care plan-with higher deductibles and a $ 2,000 cap on hospital expenses each year-had provoked outrage. "They think they can treat us like children that don’t have families, mortgages or dreams of retirement," she said.

Outside Viacom’s headquarters, several workers held posters with the words, "There’s too many of us to ignore. " It was unclear how many freelancers are on the company’s payroll; an MTV Networks’ spokeswoman said the figure was not known because it rises and falls throughout the year. The company has 5,500 full-time employees, excluding freelancers, around the world.

Two freelancers and one full-time employee, who asked not to be identified for fear of retribution, estimated that the percentage of freelancers in some departments exceeded 75 percent. Another labor action is expected to take place outside Viacom later this week. Members of the Writers Guild of America, who have been on strike for five weeks, are expected to picket there on Thursday.

What can we infer from the assertion that "corporations were competing to see which could provide the most mediocre health care coverage" 9()

A. Some benefits packages for full-time employees have already been a standard for freelancers

B. Those who provide lesser health care coverage will be degraded in the industry evaluation

C. Some companies use mediocre health care coverage as an edge in attracting freelancers

D. It is a common practice for the companies not to provide adequate health care coverage for freelancers

题型:单项选择题

生甘遂的内服用量是()

A.3~6g

B.3~9g

C.1~2g

D.0.5~1.5g

E.0.3~0.6g

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