债券具有()的特征。A.债权凭证 B.是债务人还本付息的凭证 C.领取股息的凭证 D

加氯消毒饮水时，供水末梢水中要求含一定量余氯，监测余氯的主要作用是（）

A.保持继续消毒的能力

B.保证管网内的水持续消毒

C.保证感官性状良好

D.保证流行病学上安全

E.增加消毒剂与饮用水的作用时间

某三跨预应力混凝土连续梁桥，跨度为90m＋155m＋90m，箱梁宽14m，底板宽7m，箱梁高度由根部的8.5m渐变到跨中的3.5m，根据设计要求，0#、1#块混凝土为托架浇筑，然后拼装挂篮，用悬臂浇筑法对称施工，挂篮采用自锚式桁架式结构。施工单位根据该桥的特点，制定了详细的施工流程，其中对箱梁悬臂浇筑阶段的主要施工工序如下：

1.墩的两侧安装托架并预压，架立模板、绑扎0#、1#块钢筋，浇筑混凝土并张拉预应力筋；

2.拼装挂篮，用堆载法预压挂篮，以消除挂篮的非弹性变形；

3.按设计标高值加预加抬高量值架立模板、绑扎钢筋、浇筑各个节段的箱梁混凝土；

4.张拉预应力筋；

5.拆除模板，移动挂篮，开始下一个节段的施工。

6.在整个悬臂浇筑过程中，定时进行箱梁节段标高的测量，以及应力和温度的观测，整个测量完全满足设计和施工技术规范的要求。

[问题]：

1、施工单位在0#、1#块施工完成后拼装挂篮是否正确？如不正确，应该如何处理？

2、采用堆载法预压挂篮除了消除非弹性变形外，还有哪些目的？

3、张拉完预应力筋后能否开始作下一节段的施工？为什么？

When Dave was eighteen,he bought a second-hand car for ￡200 so that he could travel to and from work more 　1　 than by bus.It worked quite well for a few years,but then it got so old,and it was costing him 　2　 much in repairs that he decided that he had better 　3　 it.

He asked among his friends to see if anyone was particularly 　4  to buy a cheap car,but they all knew that it was falling to pieces,so  5  of them had any desire to buy it.

Dave's friend Sam saw that he was  6  when they met one evening,and said,“What's  7 ,Dave?” Dave told him and Sam answered,“Well,what about advertising it in the paper? You may   8  more for it that way than the cost of the advertisement!” Thinking that Sam's   9  was sensible,he put an advertisement in an evening paper,which read:“For sale:small car,  10  very little petrol,only two owners.Bargain at ￡50.”

For two days after the advertisement first appeared,there was no   11 .But then on Saturday evening a man rang up and said he would like to  12  him about the car.“All right,” Dave said,feeling happy.He asked the man whether ten o'clock the next morning would be   13  or not.“Fine,” the man said.“And I'll  14  my wife.We intend to go for a ride in it to   15  it.”

The next morning,at ten quarter,Dave parked the car in the square outside his front door,  16  to wait there for the person who had   17  his advertisement.Even Dave had to   18  that the car really looked like a wreck.Then soon after he had got the car as   19  as it could be,a police car stopped just behind him and a policeman got out.He looked at Dave's car and then said,“Have you reported this   20  to us yet,sir?”

1.A.directly          B.safely      C.properly      D.easily

2.A.so                  B.such            C.very        D.too

3.A.keep              B.repair      C.sell             D.throw

4.A.anxious          B.lucky          C.ashamed   D.generous

5.A.some              B.neither        C.none           D.no one

6.A.calm                  B.upset           C.delighted   D.astonished

7.A.no                         B.up                     C.it                D.that

8.A.learn                      B.miss            C.get              D.find

9.A.message                 B.advice         C.request    D.description

10.A.uses                            B.loses           C.has             D.spends

11.A.doubt                   B.help            C.trouble        D.answer

12.A.tell                       B.see              C.agree          D.call

13.A.exact                    B.suitable       C.early           D.late

14.A.follow                  B.meet           C.bring     D.introduce   

15.A.test                      B.obtain         C.admire       D.recognize

16.A.failing                  B.meaning      C.turning    D.happening

17.A.read                            B.placed    C.answered  D.understood

18.A.forget                   B.show           C.disagree      D.admit

19.A.clean                    B.crowded      C.fast             D.light

20.A.bargain                 B.sale             C.accident      D.result

客房服务员在房内作业时，必须将房门（）。

A.关闭

B.半掩

C.打开

D.打开45度

对从业人员的安全避险权，下列说法正确的是（）。

A、从业人员发现直接危及人身安全的紧急情况时，有权停止作业

B、从业人员发现直接危及人身安全的紧急情况时，在采取可能的应急措施后撤离作业场所

C、必须听从安全管理人员的指示

D、尽快完成工序性工作，尽快撤离

E、没有指示，不得擅自撤离