原初演替和次生演替有什么不同？

在一定温度下，在一体积固定的密闭中加入2mol X和1mol Y，发生如下反应：

2X(g)+Y(g)aZ(g)+W(g) △H=-Q kJ·mol^-1(Q>0)(a是正整数)当反应达到平衡后，反应放出的热量为

Q1kJ，物质X的转化率为α；平衡后再升高温度，混合气体的平均相对分子质量减小，则

（1）温度升高，平衡常数K的值_______________(填“增大”、“减小”或“不变”)。

（2）化学计量数a的值为______________。

（3）有同学认为，Q1一定小于Q，你认为该结论是否正确？___________，其理由是__________________________________。

（4）维持温度不变，若起始时向容器中加入的物质的量如下列各项，则反应达到平衡后放出的热量仍为Q1 kJ的是_____________(稀有气体不参与反应)。

A．2 molX、1mol Y、1molAr

B．a molZ、1mol W

C．1 molX、0．5mol Y、0．5a molZ、0．5 mol W

D．2 molX、1mol Y、lmolZ

（5）X的转化率α=_____________(用含Q、Q1的代数式表示)。

以下属于项目部管理责任的是（）

A.项目部必须设置专职的劳务员，明确其工作职责，在职权范围内负责施工现场劳务人员管理

B.项目部如果没有专职劳务员，可由其他有能力胜任的管理人员做劳务员的工作

C.项目部劳务管理员每天如实审查劳务人员出勤情况，每月考勤表应在施工现场进行公示，并按规定向当地建设主管部门和承包人报备

D.项目部要及时掌握劳务施工班组现场人员的变动情况，督促劳务班组严格执行劳务人员身份管理的有关规定

E.项目部应按规定在施工现场醒曰处设立农民工 * * 告示牌，公布相关劳务纠纷 * * 举报投诉电话，建立畅通的投诉举报渠道，明确受理人员，及时处理本项目部的各类投诉

People often recall having felt chilled before the onset of a cold. This supports the hypothesis that colds are, at least sometimes, caused by becoming chilled; it is the chill that allows a rhino virus, if present, to infect a person. Which of the following, if true, most seriously weakens the force of the evidence cited above

A．Being chilled is a form of stress, and stress lowers the defenses of a person’s immune system, which guards against infection.

B．After a rhino virus has incubated in a person for several days, the first symptom it causes is a feeling of chilliness.

C．People who are tired and then become chilled are more likely to catch severe colds than are people who are chilled without being tired.

D．Some people who catch colds are not sure what it was that allowed them to catch cold.

E．(E) Rhino viruses are not always present in the environment, and so a person could become chilled without catching a cold.

人的认知结构的主观部分可分为价值规范结构、知识结构和（ ）

A．观念结构

B．素质结构

C．行为结构

D．能力结构

A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with (26) , and that it has a mechanism for (27) graphical files. Display text, display graphics, and (28) hyperlinks-there’s 99 percent of the (29) value. That’s not to say that the manufacturers didn’t go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client-side Java applets were supposed to become the preferred (30) for application development Remember frames and all their nasty side effects

A．Web browser’s

B．terminal’s

C．emulator’s

D．network’s