荷载标准值是具有多少保证率的荷载取值（）。 A.80% B.85% C.90% D.

A great way for teens to cool off during the summer is at water parks. If you live near a water park, you might think about getting a season pass. This way you can go as often as you like.

Check to see if there are any water parks around you. Many are indoor facilities. So even if it isn’t warm enough where you live to swim outdoors, you can enjoy swimming in a temperature controlled area.

The prices are usually good. For example, one ticket to Water World, a water park, is only $5.

Some teens like to get a part time job over the summer to make some pocket money. Older teens shouldn’t have much trouble finding jobs.

An idea is to get some teens together to form your own summer job business. You can walk dogs, bring in the newspapers, feed the cats, collect rubbish, water flowers, etc.

Being that it’s summer, many people go on vacation and could use someone to look after their houses while they’re away. You can also think about other jobs you can do for them.

Teens love freedom. Sure you would like to get to such places as the small, movie theaters, the zoo, the beach, picnic, bowling and local amusement park instead of staying home all summer. Then a summer bus pass will be helpful. Check to see if your area has one for you teens.

Such a pass costs only $10 for the whole summer. The price is reasonable(合乎情理的) and also your parents don’t have to always drive.

小题1:Who is the text written for?

A．Teachers

B．Parents

C．Teens

D．Travelers小题2:What is NOT mentioned as a part tome job for teens?

A．Washing cars

B．Feeding cats

C．Walking dogs

D．Watering flowers小题3:If Sally goes to Water World with two friends, they should pay________.

A．$5

B．$10

C．$15

D．$20小题4:A summer bus pass is helpful for teens to ______.

A．find part time jobs

B．go out for fun

C．go to summer classes

D．do outdoor sports小题5:What’s the text mainly about?

A．Part time jobs

B．A summer pass

C．Water park swimming

D．Things to do in summer

（五） 背景资料某安装工程公司承接一锅炉安装及架空蒸气管道工程，管道工程由型钢支架工程和管道安装组成。项 目部需根据现场实测数据，结合工程所在地的人工、材料、机械台班价格编制了每10t 型钢支架工程的直 接工程费单价，经工程所在地综合人工日工资标准测算，每吨型钢支架人工费为1380 元，每吨型钢支架工 程用各种型钢1.1t，每吨型钢材料平均单价5600 元，其他材料费380 元，各种机械台班费400 元。 由于管线需用钢管量大，项目部编制了两套管线施工方案。两套方案的计划人工费15 万元，计划用钢 材500t，计划价格为7000 元/t，甲方案为买现货，价格为6900 元/t，乙方案为15 天后供货，价格为6700 元/t。如按乙方案实行，人工费需增加6000 元，机械台班费需增加1.5 万元，现场管理费需增加1 万元。 通过进度分析，甲、乙两方案均不影响工期。安装工程公司在检查项目部工地时，发现以下问题： （1）与锅炉本体连接的主干管上有一段钢管的壁厚比设计要求小 1mm。该段管的质量证明书和验收手 续齐全，除壁厚外，其他项目均满足设计要求。 （2）架空蒸气管道坡度、排水装置、放气装置、疏水器安装均不符合规范要求。 检查组要求项目部立即整改纠正，采取措施，确保质量、安全、成本目标，按期完成任务。问题

分别计算两套方案所需费用，分析比较项目部决定采用哪个方案？（5 分）

离心泵停泵时，先（）。

A、按电钮停泵

B、关闭泵进口阀

C、同时操作

D、关闭泵出口阀

菊花具有的功效是

A．平降肝阳，息风止痉
B．疏风清热，清利咽喉
C．疏风清热，息风止痉
D．疏散风热，清热解毒
E．清肺止咳，清热解毒

简述U型生产线的优缺点。