变更的时间通常很紧迫，可能发生现场停工，等待变更通知，这种情况通常发生在（）。 A.

高温巴氏消毒效果好，但不能杀灭（）

A.繁殖型微生物

B.大肠杆菌

C.芽孢型微生物

D.沙门菌

E.酵母菌

（8分）三聚氰胺（化学式为C₃H₆N₆）是一种白色结晶粉末，因其低毒、含氮量高，俗称“蛋白精”。不法分子为了提高奶粉中的蛋白质含量而加入三聚氰胺，导致发生婴幼儿泌尿结石病例。某化学兴趣小组同学欲探究三聚氰胺的制取原理：

【查阅资料】

（1）化工企业常用尿素合成法制取三聚氰胺。即以尿素[化学式CO(NH₂)₂]为反应物，硅胶为催化剂，在380℃至400℃的温度下，沸腾反应、冷凝得到三聚氰胺，同时产生两种无色气体，其中一种气体具有刺激性气味。

（2）NO是无色气体，不溶于水，在空气中能迅速氧化为棕色NO₂气体。

【提出问题】反应生成的两种气体是什么？

【假设猜想】根据资料及反应物判断，生成的两种气体可能是：

①二氧化碳和水蒸气    ②二氧化碳和氨气（NH₃）

③二氧化碳和氮气      ④二氧化碳和二氧化氮

提出以上猜想的依据是                                ；

你认为合理的猜想是（填序号）           ，理由是                             。

【设计实验】同学们在老师的指导下，设计如图所示的实验模拟制取三聚氰胺，并验证猜想。

【实验现象和分析】

（1）A装置的作用是                              。

（2）实验时观察到B中棉花变红，证明生成了        ，同时看到D中        现象，说明还生成了二氧化碳。

（3）C中浓硫酸的作用是                           。

【实验结论】根据资料和实验现象分析可知，用尿素分解制取三聚氰胺的化学方程式为

                                               。

One Tuesday evening in the beginning of the fall 1996 semester at Shippensburg University, sirens(警笛) sounded. These sirens were not in celebration; they were a cry to the university that something was wrong. A house, only one block away, was on fire. Nine of the university's students lived there.

From the minute the word got out that help was needed, it seemed like everyone showed up. The victims of the fire were offered endless invitations for housing for the night. The very next day, everyone got into gear to do their part in helping them. Flyers (小传单) were posted with items that were immediately needed, just to get these students through this next couple of days. Boxes for donations and money jars were placed in every residence hall（学生宿舍）．

As a residence director，I went before the students in my hall to ask them to do what they could. I knew that college students don't have much, but I asked them to do their best: “Every little bit will help." I really didn't think they could do much. I was proved wrong.

At the hall council meeting the night after the fire, my residents decided to have a wing competition, where each wing of the building would team up to see who could bring In the most donations. I announced that the wing who won would receive a free pizza party.

Thursday evening we announced over the PA system that we were beginning the wing competition. Within minutes, the place exploded. The single large box that I had placed in the lobby (太厅) was over-flowing. We quickly grabbed more boxes, and we watched in amazement as they, too, filled to the brim. Members of the resident assistant staff and I began to count the items. I was astonished by what I saw, and I was inspired by these kids.

When we came to the final tally（得分）, the winners turned to me and announced that they would like to donate their winnings as well. They wanted the victims of the fire to have their pizza party.

Tears welled up in my eyes. I had watched these students jump to action, work tirelessly and donate all that they could. And then, as if that were not enough, they handed over their reward’s was touched and so very proud of them.

小题1:The writer mainly wanted to      by the story.

A．tell us the suffering of nine of the college students from a fire

B．praise the college students helping the victims selflessly

C．tell us how successful the wing competition was

D．show he was deeply moved by the college students' action小题2:The phrase "get into gear" in the second paragraph means      .

A．be eager

B．take action

C．be prepared

D．start working小题3:At first, the residence director thought      .

A．it was impossible to expect the college students to donate anything

B．it was easy to collect a lot of donations from the college students

C．the college students would donate not much

D．the college students would donate all the items they had小题4:The wing competition was held      .

A．on Tuesday evening

B．on Thursday

C．on Wednesday evening

D．the very next day小题5:How did the residence director feel when he saw the brimful boxes?

A．Terrible．

B．Funny．

C．Surprised．

D．Serious

根据公司法律制度的规定，下列有关国有独资公司组织机构的表述中，不符合规定的有( )。

A．国有独资公司不设股东会

B．国有独资公司监事会成员不得少于3人

C．国有独资公司董事长由董事会选举产生

D．国有独资公司董事会成员不得兼任经理

某日化厂为增值税一般纳税人，2009年3月香水生产成本20元/瓶，不含税售价25元/瓶，香粉生产成本18元/瓶，不含税售价20元/瓶；该企业将自产的3000瓶香水和2000瓶香粉移送用于连续生产套装化妆品；将自产的香水和香粉各500瓶分给职工用作福利，该企业上述业务应纳消费税( )元。

A．0
B．21600
C．1734.78
D．6750